/lit/ - Literature

>>19031625
Well first off you can cast aside the notion of evolution that demands any trait be adaptive. It's true that mutations are random, and the best mutations modify a trait so that it confers some evolutionary advantage. However, for a trait to persist what is most important is that it does not put the organism at a disadvantage. Ever since humans figured out agriculture, whatever random mutations accrued in regards to humans' sexual attraction architecture probably became much selective for heterosexuality. Furthermore exaptations can arise when a complex trait takes on some new dimension without the qualifications of immediately providing some increase in the fitness of an organism. Why do some people get off by watching fat people step on food? Probably because humans are doing TOO well. Check out this recent landmark study of the genetic basis for homosexuality. Turns out gay genes are also more highly associated with mental illness genes (lol)

https://www.science.org/doi/full/10.1126/science.aat7693