that's a false equivalency idiot, people can theoretically put their private parts into any orifice, but the male penis was designed for the female vagina, in fact if you insert a male penis into a female vagina, in an "in and out" fashion for long enough, the male will ejaculate a substance that can bring forth life from a female body.
how the hell is that any comparison to oral sex or ear sex, or fat sex?
That's what I just said.
The penis was only designed to be put in the vagina, so it probably shouldn't be put anywhere else, including the mouth. Which is why oral sex is unnatural and bad.