If the biological purpose of sex is to procreate, then anyone participating in oral sex, anal sex, sex without a condom, sex with the pull out method, sex while on birth control, etc.. are deviants. Not just homosexuals. Also included would be impotent men, sterile women, and anyone else along those lines where genetics or disease (or accidents, etc.) have rendered them unable to procreate.
If you watch porn, you are a deviant as well as it is not a product of biological sex.
If homosexuality is nature's birth control.... well that says a hell of a lot about the Republican party. Kind of bad when even Mother Nature thinks you are an idiot.
Some people obviously just do not think their talking points through before bleating them out.