A time before Microsoft's Project Natal was revealed. Referred to as a simpler time by many as we didnt have to get off the damn couch to play a game.
Guy 1: Dude! look at this old game controller!
Guy 2: Woah! It has buttons and you have to hold it!
Guy 1: Yup, this right here is some ancient preNatal technology.
Guy 2: Gotta love the good ol' days.
So named because they existed before your birth
If your prenatals have no children, chances are neither will you.