This is extremely popular especially in gay sex and gay porn where there is no other option aside from mouth and ass.
Despite the risks that come with it, there is a certain amount of pleasure that is only present when things are done from the back.
Surely you have fantasized or noticed some lady with a big ass, among porn celebrities dry humping and anal sex have become common.
Because of this, in the porn industry, ejaculating or cumming has another popular additional hole to land into.
For optimal viewing, anal creampie porn focuses the camera on the dripping part once the man has cum inside the ass of the woman.