Oh no, some guys like other guys. Some girls like other girls. It must mean the end of the world.
Look, not to put too fine a point on it, but there's been homosexuals since ancient times. It was an established practice even in ancient Sparta - and I'm pretty sure none of the bigots on this board would have gone face to face with them.
I'm not gay, but a lot of my friends are, and who cares? Unles you yourself are gay, or are frantically denying it from deep in the closet, two people of the same gender having sex has literally nothing to do with you, unless you like to watch.
Would you turf out your own kids simply because of who they found attractive? If not, then maybe reconsider if someone's sexuality is truly that threatening. If you would, you're a piss poor parent.
