First 69
A woman took an inexperienced man home one night. When they got to her apartment, she suggested that they try a 69. "What do you mean?" he asked. Not knowing quite how to explain, she said, "You put your head between my legs and I'll put my head between your legs." Still unsure but willing, he agreed.
As soon as he got his head between her legs, she let out a rip roaring fart. "What the hell was that?!! he asked. "OOPS! I'm sorry! Let's try again", she said. On the second attempt the very same thing happened. He immediately got up and started getting dressed. "Where are you going?" she asked.

The man replied, "If you think I'm sticking around for 67 more of those, you're crazy!!"