Because God says that it's morally unacceptable to be a homosexual.
Personally, my morality can be summed up quite easily..."Don't Hurt Anyone". Very simple. Muderers violate the rights of others.
I believe that children lose their innocence by learning about homosexuality at a young age. I believe that it "hurts kids" to teach them this insanity. I've got other stuff to do now, so I'm signing off of this debate. Know one thing: I won't tolerate a grown man teaching my child about homosexuality. Ever.