To enter suitably the proper places,
Or, having entered, the seed is weakly mixed
With seed of the woman: harmonies of Venus
Are seen to matter vastly here; and some
Impregnate some more readily, and from some
Some women conceive more readily and become
Pregnant. And many women, sterile before
In several marriage-beds, have yet thereafter
Obtained the mates from whom they could conceive
The baby-boys, and with sweet progeny
Grow rich. And even for husbands (whose own wives,
Although of fertile wombs, have borne for them
No babies in the house) are also found
Concordant natures so that they at last
Can bulwark their old age with goodly sons.
A matter of great moment 'tis in truth,
That seeds may mingle readily with seeds
Suited for procreation, and that thick
Should mix with fluid seeds, with thick the fluid.
And in this business 'tis of some import
Upon what diet life is nourished:
For some foods thicken seeds within our members,
And others thin them out and waste away.
And in what modes the fond delight itself
Is carried on--this too importeth vastly.