Hm. Sorry, but it still sounds like a bunch of pseudoscience to me. It sounds like it's trying to suggest that straight is the "natural" thing that way, which is a strange thing to suggest when other sexual orientations are common among a multitude of species. Somewhere in the middle would be going back to the "balance" that's apparently supposed to be straight. And such a balance would come with certain physical effects, too. Estrogen doesn't make you like men, and testosterone doesn't make you like women. Otherwise there shouldn't be gay men --a fetus develops male parts because its starts producing the hormones to develop them. Or, say, people who get hormone treatment but still like the same sex. There are other things that seem off about it, but I'm not enough of an expert to go in depth about this kinda science.