For a man, the act of inserting his own penis into his anus. For most of them, it's would be satisfying to do, but there's a tiny lack of length, so they use another "shopping cart unlocker", a friend's one for example.

Voluntarily Celibate.
A person who chooses to be celibate. Can be for any given amount of time, for a short period or for their entire life. Can be for religious reasons or not.

related: incel