Is there any proof or evidence that homosexuality is morally wrong?

[Sarah Louise]

There is no moral or ethical reason why two adults of the same sex should not have consensual sex and relationships. It makes gay people happy whilst not affecting anyone else in any way.
When people try to find evidence against homosexuality, it falls into these categories:
1) Anal sex is bad for you.
Anal sex happens between any couple in which one has a penis. That's all heterosexual couples but only half of homosexual ones. Homosexuality =/=anal sex. Also this only affects the people doing it and so cannot be considered morally wrong whoever does it.
2) Gay men have a higher incidence of AIDS than straight people.
And lesbians have a lower incidence of AIDS than straight people. Does this indicate that lesbian homosexuality is the most moral form of sex followed by heterosexuals , followed by gay men? How does the danger of something indicate morality anyway? The police are at greatest risk of being beaten up. Does this make law enforcement the most immoral thing you can do?
3) There is more mental illness and suicide amongst LGBT people.
This incidence decreases where LGBT people are accepted. Intolerance and homophobia leads to mental illness, not homosexuality.
4) Gay couples might want to have children and the children might be bullied.
See point 3.