Why are most religions agains homosexuality?

[Chad32]

Just why? Homosexuality doesn't hurt anyone. Is it because religions want more followers and homos don't usually reproduce? Then why aren't Catholic priests llowed to marry? Are they supposed to have a relationship only with God? Also, Christianity preaches that you should be ashamed of sex. If they wanted people to reproduce why would they make them fear reproduction?
Is it because homosexuals are a minority, and humans naturally despise who isn't following the herd? Does religion preach against homosexuality so that it could attract the majority?

Homosexual actions. Because we believe sex is meant as a self giving act between one man and one woman who are married. Having sex outside of this context is contrary to our beliefs on sexual morality.

I'm not sure what you are talking about when you say Christianity teaches us to be ashamed of sex lol. I'm certainly not. I think people (in and out of the church) confuse the notion of keeping sex sacred with being ashamed of it.

There are no sexual acts that are exclusive to homosexuality, though. A straight married couple can do whatever any two guys would want to do with each other. So it can't be the actions that bother most theists. It has to be something else.