"Dude came out of the portapotty, thought he'd lost his keys, so he goes back in and gets his arm stuck digging for them. The firemen free him and hose him off. He then discovers his keys in his back pocket."
When a parent is unknowingly cockblocking their kid by being home. The parent is at home, leaving the kid and his girlfriend with no place to get it on. Therefore the parent is obliviously cock blocking.
Matt's Friend: "Yo Matt, did Katie come over last night?"
Matt: "Yeah, but my parent were being complete oblivious cock blockers!"