The only thing that I dislike about gay people is anal sex.
If the anus was meant for that sort of thing then sure go for it but, its not. It seems even most women don't like anal sex. So gay men do it just as some act of affection or love.
I personally don't mind it, the way I see it is we're all free to use our bodies as we see fit whether to abuse drugs or go all suicidal, or for love whatever. These days it does not matter as our planet is over populated anyway so just let people get on with anything they want to do and be happy.
You would be surprised by how few in the homosexual community actually perform anal sex.. the number is similar to that in the heterosexual community. The majority of the "love making" is focused primarily on foreplay.