An autopederast is a man who can insert his penis into his own anus. This is impossible for most men, although the practice exists in pornography, usually that directed at gay men. It can only be accomplished with a semi-erect penis. Ejaculation is not believed to be possible.
More About Autopederast
The term autopederast comes from “pederasty,” a term used to refer to customary homosexual relationships between men and adolescent males, such as those that occurred in ancient Greece. The term has since been used as a synonym for anal sex, regardless of the partner involved.