Ferrari versus children

Okay, Aydan, you're not the sharpest tool in the shed, are you? The joke plays on a horrifying stereotype that associates pedophilia with owning children. It's an extremely dark and disturbing topic but the punchline subverts what the listener was expecting by being innocent. So the listener would initially think you are about to make a terrible joke but it ends up just being about the fact that the speaker doesn't have a Ferrari.