A girl brings a guy home one night. They get into her apartment and immediately she suggests that they do '69'.
"What the hell is that?" asks the guy.
Realizing he's inexperienced, she explains, "I put my head between your legs and you put your head between mine."
Still not understanding, but not wanting to ruin the moment, he agrees to try. The second they get into position, she lets out a rip-roaring fart.
"What was that for?" he asks.
"Oops! Sorry, let's try again," she says.
They get into position again, and once more she lets one loose. The guy gets up and starts to put his coat on.
"Wait, where are you going?" she asks.