From behind, you shove both fists in her ass (or his if in prison). Thereupon she turns around in a one-eyed winking motion signaling that she has been there and done that.
When Doing a girl doggy style and you attempt to put it in her bum, she looks back at you with one eye (like a fish) and goes "ah ah ah ah ah ah!" (the dolphin)
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.