Quote:
Originally Posted by afc wimbledon
I am not sure the existance of a trait means it bestows an advantage.
Many traits have died out because they didn't bestow an advantage,
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True, a trait (or rather a section of genetic code) will become corrupt over time if it isn't selected for, but that takes time.
But since we see homsexuality in animals very far removed from us in evolutionary terms (birds for example), either the genetic portion that contributes to it has been around for a looooong time, or it's evolved separately in different lineages (which isn't unreasonable, eyes and flight are just two examples of things that have evolved many times over separately).