Maladaptive traits also evolve. Just because something evolves doesn't mean that it necessarily increases fitness. Especially when it comes to humans,
where our reproductive fitness isn't necessarily dependent on our biology. It is also possible that bisexuality existed prior to homosexuality and
homosexuality branched off from that.
You have to look at proximate and ultimate causes of characteristics, the hows and the whys. It is possible it is a gene that correlates with another trait that does get selected for. As for why, perhaps it has to do with sex being recreation and pleasurable.
You have to look at proximate and ultimate causes of characteristics, the hows and the whys. It is possible it is a gene that correlates with another trait that does get selected for. As for why, perhaps it has to do with sex being recreation and pleasurable.


