A proposed scenario where, during sex, the vaginal muscles suddenly close around the penis, lodging it in the vagina and keeping it stuck there. It's been said that, should this occur, even after the errection dies down, it would require surgery to fix this. No real occurence has happened thus far.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)