Another cause may be, too much weakness of the yard, and tenderness
thereof, so that it is not strong enough erected to inject seed into the
womb; for the strength and stiffness of the yard very much conduces to
conception, by reason of the forcible injection of the seed.
Also, if the stones have received any hurt, so that they cannot exercise
the proper gift in producing seed, or if they be oppressed with an
inflammation, tumour, wound or ulcer, or drawn up within the belly, and
not appearing outwardly.
Also, a man may be barren by reason of the defect of seed, as first, if
he cast forth no seed at all, or less in substance than is needful. Or,
secondly, if the seed be vicious, or unfit for generation; as on the one
side, it happens in bodies that are gross and fat, the matter of it
being defective; and on the other side, too much leanness, or continual
wasting or consumption of the body, destroys seed; nature turning all
the matter and substance thereof into the nutriment of the body.
Too frequent copulation is also one great cause of barrenness in men;
for it attracteth the seminal moisture from the stones, before it is
sufficiently prepared and concocted. So if any one, by daily
copulation, do exhaust and draw out all their moisture of the seed, then
do the stones draw the moist humours from the superior veins unto
themselves; and so, having but a little blood in them, they are forced
of necessity to cast it out raw and unconcocted, and thus the stones are
violently deprived of the moisture of their veins, and the superior
veins, and all the other parts of the body, of their vital spirits;
therefore it is no wonder that those who use immoderate copulation are
very weak in their bodies, seeing their whole body is deprived of the
best and purest blood, and of the spirit, insomuch that many who have
been too much addicted to that pleasure, have killed themselves in the
very act.
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