by Aristotle
13 · Why is it that we regard the creature which is born from our own semen [878a1] as our offspring, while that which is produced from any other part of us or from any other excretion is not looked upon as our own? For many things are produced by putrefaction, even from semen. Why then is that which resembles us claimed as our own, while that which is alien to us is not so considered? For either all or none ought [5] to belong to us. Is the reason that, in the first place, what is produced from the semen is born from what is our own, but that which is produced otherwise originates from something which is not ours, namely, from what is purged or excreted from us? In a word, nothing in a creature procreates another creature except the semen; [10] and that which is harmful and evil, and also that which is alien, is not claimed by anything as its own; for it is not the same thing to be part of a thing and to be alien to it and other than it and evil. Now our excretions and putrefactions are not our own but are other than us and alien to our nature. For all things that grow in the body must not be considered as belonging to the body, for even boils grow on it and these [15] are removed and got rid of. In a word, all things that are contrary to nature are alien to the body, and many of the things that grow there are contrary to nature. If therefore the semen is the only thing in us from which a creature can be born, we should be right in regarding as our own offspring that only which is produced from the semen. Moreover anything else which is produced from the semen, as for instance, when it putrefies, a worm, or the so-called monstrosities, when there is [20] corruption in the womb, are not to be reckoned as offspring. In a word, anything which is produced from corruption is no longer produced from that which is our own but from that which is alien to us, like that which is generated from excretions such as ordure. That all such things are produced from corruption is proved by the fact [25] that what is generated from uncorrupted semen is of such a nature as to resemble that from which the semen came, a horse being born from a horse and a man from a man. And we do not value the semen in itself or everything that is being completed in the process of coming into being (for it is sometimes moisture and a mere mass [30] and flesh which is coming into being),1 because it has not yet its true nature but only so much of its nature as is implied in the fact that it is so disposed as to produce something resembling ourselves; and nothing even of this kind can be produced from corrupted semen. For these reasons we do not regard as our offspring that which is produced either from anything else in us except the semen, or from the semen when it is corrupted or fails to achieve perfection.
[35] 14 · Why are people less able to have sexual intercourse in the water? Is it because in water none of those things liquefy which liquefy with heat—lead, for example, or wax? Now the semen obviously liquefies with heat, for it does not liquefy until it is warmed by the friction. Fishes, however, have sexual intercourse without friction.
[878b1] 15 · Why is it that sexual intercourse is the most pleasant of all things to animals, and is it so of necessity or with some purpose in view? Is it pleasant because the semen comes either from the whole body, as some declare, or not from the whole [5] body but only from the area over which all the ducts of the veins extend? The pleasure then of the friction being similar in both cases, the sensation extends as it were over the whole body. Now the friction is pleasant, since it involves the emission of vaporous moisture enclosed unnaturally in the body; but the act of generation is [10] an emission of similar matter for its natural purpose. It is pleasant both of necessity and for the sake of something,—of necessity, because the way to a natural result is pleasant, if it is realized by the senses; and for the sake of something, namely, the procreation of animal life. For it is the pleasure more than anything else which incites animals to sexual intercourse.
16 · Why is it that sexual excess is beneficial in some diseases caused by phlegm? Is it because it involves the emission of an excretion, and so a considerable [15] amount of excreted matter is rejected with it, and phlegm is an excretion?
17 · Why does sexual intercourse cool and dry the stomach? Does it cool it because the heat is expelled in coition? Coition causes dryness, because, as the heat goes out, the moisture is vaporized and finds its way out as the body cools, while at [20] the same time the heat caused by the act of copulation has a drying effect.
18 · Why are those whose eyelashes fall off accounted lustful? Is it for the same reason as that for which the bald also are so accounted? For the eyelashes and the hair of the head really belong together. The reason is that all the congenital hair [25] which does not increase as a man gets older, falls off owing to lustfulness. For the hair of the head and the eyebrows and eyelashes are congenital hair; and of these the eyebrows alone sometimes grow thicker with advancing years (the reason for this has been stated elsewhere), while the hair of the head and the eyelashes both fail from the same cause, viz., that lustfulness cools the upper parts of the body [30] which are deficient in blood, and so this portion of the body does not concoct any of the nourishment, and the hair not receiving any nourishment drops off.
19 · Why is it that those who wish to pass urine cannot have sexual intercourse? Is it because the ducts become full? Now that which is full of moisture cannot admit any more moisture. [35]
20 · Why is it that varicose veins prevent both man and any other animals which suffer from them from procreating? Is it because varicose veins are due to a displacement of breath, and this is why they are beneficial to melancholic diseases? Now sexual intercourse also is accompanied by an emission of breath. If therefore a [879a1] rush of breath makes its way along when sexual intercourse is taking place, it fails to impart movement to the semen and the latter becomes cold; consequently it enfeebles the erection of the penis.
21 · Why do those who have sexual intercourse usually become languid and weaker? Is it because the semen is an excretion from the whole body, and so the [5] composition of the body, like the harmony of a building, is disturbed by the loss of any portion of it—if, for example, all the blood or any other component part of it is removed? So important is that which the body loses in sexual intercourse, being indeed formed from a large amount of nourishment though itself small in quantity, just as a cake is made from wheaten flour. [10]
22 · Why is it that the penis is greatly distended in those who have sexual intercourse at a time when they desire to pass urine? Is it because, owing to the ducts being full of moisture, the semen, passing out through a narrower space, swells the bulk of the penis and lifts it up, for it is situated close to the ducts.
[15] 23 · What is the cause of the erection and swelling of the penis? Are there two reasons, first, that it is raised by a weight applied behind the testicles, the latter acting as the fulcrum, and, secondly, that the pores become full of breath? Or does its bulk become greater from the increase of the moisture and its change of position, [20] or from the formation of moisture? Now very large objects are less easily moved, because the weight is farther away from the fulcrum.
24 · Why is it that those who have sexual intercourse or are capable of it have an evil odour and what is called a goat smell, whereas children do not? Is it because, as has already been said, in children the breath concocts the moisture and [25] perspiration, whereas the perspiration of grown men remains unconcocted?
25 · Why is it that in summer men are less capable of sexual intercourse and women more so? As the poet says,
Men, when the artichoke blooms, are weaker and women more wanton.2
[30] Is it because the testicles hang down lower then than in the winter, and they must be drawn up if sexual intercourse is to take place? Or is it because hot natures collapse in summer when the heat is excessive, but cold natures are invigorated by it? Now a man is dry and hot, but a woman is cold and moist; consequently a man’s strength is impaired, but a woman’s is invigorated, its deficiency being compensated by its [35] opposite.
26 · Why is it that some persons find pleasure in submitting to sexual intercourse, and some take pleasure in performing the ac
tive part, and others do [879b1] not? Is it because each form of excretion has a region in which it is naturally secreted and, when an effort is made, the breath in finding its way out causes the excretion to swell and expels it; for example, urine collects in the bladder, food from which the moisture has been extracted in the bowels, tears in the eyes, mucous [5] matter in the nostrils, and blood in the veins? Similarly the semen collects in the testicles and penis. In those whose ducts are not in a natural condition, owing either to the blocking up of the ducts leading to the sexual organs (as in the case of eunuchs or other victims of sexual disablement) or to some other cause, all such moisture collects in the region of the fundament; for it is by this way that it passes [10] out of the body. That this is so is proved by the contraction of that part in sexual intercourse and the wasting of that region of the body. If therefore through wantonness a man has a superfluity of semen, it all collects there; and so, when desire comes upon him, the part in which it is collected desires friction. This desire may be due to diet or to thought. When desire is stirred from any cause, the breath collects and secretion of this kind flows to its natural place. If the secretion be thin [15] and full of air, when the breath finds its way out the desire ceases (just as the erection in boys and older persons sometimes ceases without the discharge of any moisture); but when the moisture dries up . . .3 And if neither of these things occurs, the desire continues till the one or the other of them takes place. But those who are [20] effeminate by nature are so constituted that little or no semen is secreted where it is secreted by those who are in a natural state, but it collects in this part of the body. The reason for this is that they are unnaturally constituted; for, though male, they are in a condition in which this part of them is necessarily incapacitated. Now incapacity may involve either complete destruction or else perversion; the former, [25] however, is impossible, for it would involve a man becoming a woman. They must therefore become perverted and aim at something other than the discharge of semen. The result is that they suffer from unsatisfied desires, like women; for the moisture is scanty and has not enough force to find its way out and quickly cools. [30] When it finds its way to the fundament only, there is a desire to submit to sexual intercourse; but if it settles both there and in the sexual organs, there is a desire both for performing and submitting to the sexual act, and the desire for one or other is greater as more semen is present in either part. This condition is sometimes the result of habit; for men take a pleasure in whatever they are accustomed to do and emit the semen accordingly. They therefore desire to do the acts by which pleasure [35] and the emission of semen are produced, and habit becomes more and more a second nature. For this reason those who have been accustomed to submit to sexual intercourse about the age of puberty and not before, because recollection of the past [880a1] presents itself to them during the act of copulation and with the recollection the idea of pleasure, desire to take a passive part owing to habit, as though it were natural to them to do so; frequent repetition, however, and habit become a second nature. All this is more likely to occur in the case of one who is both lustful and effeminate. [5]
27 · Why is it that those who desire to submit to sexual intercourse feel a great shame about confessing it, which they do not feel in confessing a desire for meat or drink or anything of that kind? Is it because the desire for most things is necessary and its non-satisfaction is sometimes fatal to life, but sexual desires proceed from something beyond mere necessity? [10]
28 · Why is it that men are more inclined for sexual intercourse in the winter and women in the summer? Is it because men are hotter and drier in their nature, and women moister and cooler? In men therefore during the winter the moisture and heat are sufficient to cause the impulse (and it is moisture and heat which give [15] rise to the production of the semen), whereas in women the heat is less and the moisture is congealed owing to the lack of fire. But in summer in women4 the heat is well proportioned, whereas in men it is more than sufficient; for the excess dissolves much of their strength. For this reason also children are thinner during the summer; [20] for it is a case of ‘fire added to fire’.
29 · Why is it that those who are hot by nature, when they are strong and well nourished, if they do not have sexual intercourse are often oppressed by bile, which makes its way down in a very bitter condition, and a salty phlegm is [25] engendered, and their complexion changes? Is it because some excretion always comes away with the semen? (That is why also the semen of some men who emit a large quantity of excretion5 is said to smell of the water in which fish have been washed.) So when they have sexual intercourse, this excretion comes away with the semen and so causes no inconvenience; but if they abstain from copulation, the excretion becomes bitter or salty.
[30] 30 · Why are the melancholic particularly inclined for sexual intercourse? Is it because they are full of breath, and the semen is a discharge of breath? If so, those whose semen is full of breath must necessarily often desire to purge themselves of it; for thus they are relieved of it.
31 · Why are birds, and men with thick hair, lustful? Is it because they have [35] a large amount of moisture? Or is this not true (for the female sex is moist and not hairy), but is the real reason that the natures both of birds and of thickhaired men are able owing to their heat to concoct a large quantity of moisture? This is indicated by the presence of hair and feathers. Or is it because the moisture is plentiful and is overpowered by the heat? For if the moisture were not plentiful or [880b1] were not overpowered, hair would not grow on human beings nor feathers on birds. Now the semen is formed most plentifully under conditions of locality and at seasons that have these characteristics, in spring for example, which is naturally moist and hot. Birds and lame men are lustful for the same reason, namely, that in [5] both, owing to the deficiencies of their legs, the nourishment is carried downwards in small quantities only, while the rest travels into the upper region of the body and is converted into semen.
32 · Why is it that when a man has sexual intercourse his eyes grow very weak? Is it not clear that this happens because the moisture leaves them? This is [10] proved by the fact that the semen is cold; for it does not become moist unless the heat warms it thoroughly. Nor does it require melting, for it is dispersed about the body like blood.
BOOK V
PROBLEMS CONNECTED WITH FATIGUE
[15] 1 · Why is it that long walks are more fatiguing and short walks less fatiguing over level ground than over uneven country? Is it because much movement and violent movement causes fatigue, and spasmodic movement is violent, and continuous and monotonous movement is much movement? In walking therefore on hilly ground, if the distance be long, the change provides a rest, and the [20] same movement is not continued for long, even in the case of horses, owing to the change. On even ground, on the other hand, the similarity of position continues uninterruptedly and gives the limbs no rest, but helps to make the movement continuous. Now if the distance is short, no fatigue is caused on flat ground by long-continued motion; whereas over hilly ground the violent change to an opposite [25] kind of movement, sometimes uphill and sometimes down, gives rise to fatigue. Such, in our opinion, is movement over hill country, and that over level ground is the contrary.
2 · Why is it that those who faint and those who collapse after physical [30] exertion are generally held to become smaller in bulk and their voices shriller? Is it because their voices, appearing to be less, seem shriller (this can be illustrated by the fact that those who imitate distant voices make shrill sounds), while their bulk appears less?
3 · Why is it that only the stomach becomes thinner in those who take physical exercise? Is it because the greatest quantity of fat is found round the stomach? [35]
4 · Why is it that the fat is consumed in those who exert themselves? Is it because fat melts when heated, and the movement causes heat, whereas flesh does not melt?
5 · Why is it that the parts round the belly are fattest? Is it because they are near to the nourishment? While the
n the other parts of the body receive something [881a1] from the belly, the belly itself often receives something. Or is it because the belly is exerted less than the other parts, because it has no joints?
6 · Why is it that fatigue ceases more readily if one mixes water with the oil with which one rubs oneself? Is it because the oil sinks in farther when mixed with [5] water, whereas by itself it does not penetrate so well, because it has a tendency to remain on the surface? If, therefore, it sinks in, the body is more softened; for oil is naturally hot, and hot things have a drying and hardening effect, and dryness and hardness are inexpedient in fatigue; but when applied with water the oil has a less [10] drying effect.
7 · Why is it that vomiting is prescribed for those who are suffering from fatigue, although vomiting is itself fatiguing? Is it because fatigue is caused by the crushing and pressure and weariness of the bones, and this can be caused either by some external or by some internal agency, and in the latter case from one of two [15] causes, either because the flesh overreaches its own strength, or because one bodily constituent mingles in a large quantity with the rest of the body and does not keep to its proper place, as happens with the excretions? For any burdens which are put upon us externally cause more fatigue than our own members, even though they are [20] lighter than these in weight. This can be illustrated by the fact that those who have eaten or drunk somewhat freely, though they have exerted themselves less than when they were fasting, yet feel more fatigue, because the food, being unconcocted, is not in its proper place. And since fatigue causes liquefaction, and liquefaction is [25] an excretion, it is the latter which produces fatigue in us, wandering about at random and attacking the bones and sinews and the interior parts of the flesh, which are rare and open. Consequently vomiting, by dislodging the excretion which is the cause of fatigue, naturally makes us less fatigued; for it leaves the body in the state [30] in which it was when the exertion began. Vomiting is fatiguing, not because of the excess of movement caused while it is taking place, but when it does not happen to be thoroughly carried out; for fatigue caused by vomiting occurs when a considerable amount of food is left behind and this contains excretions, which, as we have already said, happens in those who have eaten largely. If, therefore, in the latter it is [35] not exertion which causes fatigue, but they feel fatigue because of the condition in which they are, so vomiting could not be the cause of fatigue in those who do not get rid of all the food which is in them; for in that case every one who vomited would feel fatigue, whereas many through vomiting become less fatigued.