10. Meg Ryan as Sally in When Harry Met Sally (1989)
We've had the coleslaw at Katz's Delicatessen, and not once have we spotaneously burst into an orgasm, so we'd definitely call "bluff" on Sally's (Meg Ryan) over-the-top faux-gasm from a table or two away.
Still, it's undeniably enjoyable to watch Ryan put her pipes to work to convince Harry of what we hope men already know: Women fake it, mostly because they'd hate to insult you by dozing off when you think you're putting it down like Jodeci. You never are.