Man has sex with woman on stairs then leaves

Documentary about the making of American Pie (1999), American Pie 2 (2001) and American Wedding (2003).

When Erik Stifler realizes that he's the only Stifler family member who might graduate high school a virgin, he decides to live up to his legacy. After some well-meaning advice from Jim's dad, Erik's ready to take his chances at the annual and infamous Naked Mile race, where his devoted friends and some uninhibited sorority girls will create the most outrageous weekend ever.

A shy senior and a down-to-earth junior fall in love over one weekend.

A man falls in love with a girl who has short-term memory loss.

During their travel from Chicago to New York, Harry and Sally debate whether or not sex ruins a friendship between a man and a woman. Eleven years later, and they're still no closer to finding the answer.

A guy having sex with a woman on a rooftop – just to get her coffee-machine.

The Staircase of Sex