plasterbate

A sexual act of storing one's semen in a very hot place to maintain the semen's liquid form. Once have enough semen is stored, the male spreads the semen over his partner's face and waits for it to dry, creating a plaster-like mold made from semen

Guy 1: How did last night go with you and Jessica?
Guy 2: Things got pretty freaky. I plasterbated her.
Guy 1: Lucky! I've always wanted to try that. You could probably sell the mold for a couple million to some art collector.