Here are five of the biggest ruined orgasm moments in modern (pre-Internet) film.

So a guy walks into a bar with
a really long face looking very dejected and sits at the bar and orders
a drink. A while later a woman walks in also looking very down, sits a
couple stools over from him and orders a drink.
Eventually they start chatting and she asks him,"Why the long face?"
He says, "Well, my girlfriend just broke up with me. She says I'm too kinky."
Her face lights up and she says, "Wow! That's an amazing coincidence! My boyfriend just left me and he said the same thing!"
So they keep talking and they get along quite well and she says, "Why don't we head over to my place and see what happens?"
So they end up at her place and she busts out the classic line: "I'm
gonna go to my bedroom for a moment and slip into something more
comfortable."
So she comes out of the bedroom holding a bullwhip, totally decked out
in dominatrix gear. Leather. Latex. Handcuffs hanging off her belt. The
whole bit. She cracks her whip in the air and makes a big, dramatic
entrance.
The guy just looks her up and down and quickly grabs his coat and hat and starts heading for the door.
She says, "No, no, no, no! Wait! I thought you said you were into kinky stuff...?"
He says, "I am! I fucked your dog and shit in your purse. I'm outta here!"