>>11412102I think there is a strong blind denial that there is such thing as a gay gene, because of fear that people may want to cull or protect against certain traits, however if that's our map I think some things will be written there, regarding sexuality I don't think is easy to answer how flexible that trait is, for now it seems you would need a time machine to be sure.
I think you ought to start reading about genes, news regarding genes and what has been found and how.