Question about homosexuality

Have you ever thought about being gay and how it originated. I mean did someone decided to have sex with the same gender and then liked it? When did it all start? I never have thought about it like this but it's just strange. We always new about reproduction but did we always know about sex with the same gender! On another note I see so many people scared of their sexuality on here :( I just want to say don't ever be scared of it! You are all amazing and deserve the best! :)