Here’s one…
Showgirls
In what is largely regarded as the worst sex scene in cinematic history, Elizabeth Berkeley and Kyle McLaughlin demonstrate their love (or lust, as it were) in a swimming pool. Thought it’s true that the mechanics of aquatic nooky are somewhat complicated in real life, this scene just makes trying look all the more pointless. Shockingly poorly staged and executed, if you watch this scene with your eye on the geometry and/or physiology of the encounter, it’s fairly obvious that more than the cries of passion are being faked.
The rest are here.
