The usual sniggering examples of animal behaviour were brought in to explain cheating. Funny how the behaviour of shrews and gibbons is never used to explain table manners or road safety or gardening, only sex. Anyway, it was bad Darwinism. Taking the example of a monkey and applying it to yourself misses the point that animal behaviour is made for the benefit of the species, not as an excuse for the individual. Being incapable of sustaining a stable pair and supporting children is really not in the interests of our species. Neither is it really in the best interests of the philanderer.
There's nothing wrong with sexual feelings in themselves, so long as they are straightforward and not sneaking or sly. The right sort of sex stimulus is invaluable to human daily life. Without it the world grows grey.
But indeed an old religious uncle of mine taught me to speak, who was in his youth an inland man; one that knew courtship too well, for there he fell in love. I have heard him read many lectures against it; and I thank God I am not a woman, to be touched with so many giddy offenses as he hath generally taxed their whole sex withal.