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 is something to me very softening in the presence of a woman, some strange influence, even if one is not in love with them, which I cannot at all account for, having no very high opinion of the sex. But yet, I always feel in better humor with myself and every thing else, if there is a woman within ken.
What sex gives you momentarily is the total abandonment of yourself, then you are back again with your turmoil, so you want a repetition over and over again of that state in which there is no worry, no problem, no self.