You know how you have to press a button really hard on a bad TV remote.
While having sex with a girl in the doggie style position, you press her butthole with your thumb like it is a button on a bad remote.
Guy 1: I gave that chick from the bar the bad remote last night.
Guy 2: The bad remote?
Guy 1: While nailing her doggie style I was pressing her butthole with my thumb like a bad remote!