The kinky act of when a man inserts his penis in his own ass. The penis is typically flaccid as that is when it is at its most flexible, and is bent inwards or downwards to meet the asshole.
Autopenetration is synonymous with the action to self-fuck. Although getting the penis inside the asshole is not that hard at all if the penis is at a decent size and proper lube is used, it is difficult and uncommon to be able to do this to orgasm, as the penis generally stiffens while getting erect and loses the ability to bend down and inwards.
by WhoDatFreshBoi March 13, 2019