Code Golf is a reasonably well known sport of trying to code an algorithm in the shortest possible code.
Regex Golf is similar, but in general the aim is to create a regular expression that accepts the strings in one list and rejects the strings in a second list.
Any mention of pizza in a pornographic movie will result in a pizza boy having sex.
It's also a wonderful thing to play with, and that is what Medium Awareness does; the characters acknowledge and interact with elements and conventions of the medium that shouldn't technically "exist" in-universe.
Suddenly the characters can hear the ominous background music or the disembodied narration, they can read the subtitles at the bottom of your screen, and they can tell when it's almost time for a commercial break.
This trope doesn't just apply to just pizza boys, but any profession which requires house calls.
Plumbers are good for this too, complete with bad "cleaning out your pipes" jokes.
Woman: Because we're grown-ups now, and it's our turn to decide what that means.