When you take someone home after a night out but things start to get hot and heavy during the goodnight kiss which inevitably leads to doggy style/anal sex right in their front doorway.
“Hey dude, how did your date go?”
“Oh man it was was awesome, we had cheeseburgers and when I took her home she wouldn’t let me come inside (hehe) but I got her right there with the old front door backdoor!”
*high-five*