I always knew it was biological, being that i was attracted to both sexes from as young as i can remember.
Great to see even more evidence proving this fact and hopefully certain homophobic and ignorant groups in our society will stop with their flawed thinking that seeing two people of the same sex engaged in a kiss will somehow turn them gay, their kids gay and anyone else who is standing there to witness it gay
Being gay or bisexual is something we are born with in my personal experience, not a trait that is somehow learned or observed. IMHO, Sexuality is something that is hard-wired in our genetics, just like heighth and eye color. It's not a taste we aquire, it's who we are.
thanks,
Sweet Pea