Despite the classification, not all sex scenes are sexy. Some are sad, others scary, and others still are downright laughable (though not always by design). And not even the world's biggest stars are immune to showing off some slightly pathetic seduction techniques on occasion (we're looking at you Leo and Kate, RPatz and KStew and Bennifer: Part I).

But even those actors who make a habit of disrobing for the camera have expressed trepidation of the experience. Following her star-making turn in Basic Instinct, Sharon Stone told Playboy that: "I don't go, like, 'Oooh, I can't wait to rip off my clothes and jump around in front of everybody.'" Which is surprising, considering Stone's early career—and her double-appearance on the list that follows.

From Nicolas Cage's over-the-top O-Face in The Rock to Elizabeth Berkley's sea mammal in distress sexual gyrations in Showgirls, we're counting down The 25 Most Laughable Sex Scenes in Cinema History.

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