Sexual deviancy is no different. And it's not just limited to homosexuality, it includes fetishes and other things of all kinds that I really don't need to spell out here...
"Sexual deviancy" is a moving target. Oral sex and masturbation were both once considered 'sexual deviancy'- hell even women having orgasms was considered by some puritans to be sexual deviancy.
So I pretty much don't worry about what kind of sex consenting adults prefer to do.