Keanu Reeves had an explicit threesome scene with the director’s wife while filming Knock, Knock.
Margot Robbie ended up with paper cuts on her back while filming a sex scene on top of fake money in The Wolf of Wall Street.
Dave Franco’s unfortunately timed butt pimple on the set of Neighbors made his first ever sex scene even MORE awkward than it needed to be.
Aubrey Plaza wanted to break the ice before her sex scene with Robert DeNiro in Dirty Grandpa, so she slipped an “incredibly slutty picture” of herself into a book and gave it to him as a gift.
Jamie Dornan would make goofy noises instead of faking orgasm to make Dakota Johnson laugh during the more intense sex scenes in Fifty Shades Darker.
Alison Janney and Micahel Lerner were so slippery during their steamy scene in Life During Wartime, it sent Lerner to the hospital.
Robert Pattinson’s butt crack caused the sex scene in The Twilight Saga: Breaking Dawn – Part 1 to be re-cut before release.
Julia Roberts was so nervous about filming her sex scenes in Pretty Woman, she LITERALLY broke out in hives.
Mark Wahlberg’s first prosthetic penis for Boogie Nights was way too long, so they “embarrassingly” had to re-make a second, shorter one…which Wahlberg kept.
Keira Knightly needed SEVERAL back-up versions of her famous green dress in Atonement because the dress kept ripping during the library sex scene.
Director John Turturro thought that Kate Winslet and James Gandolfini seemed too tense during their sex scene in Romance & Cigarettes, so he replaced Gandolfini with a “big bouncy ball.”
Ben Affleck tried to simultaneously direct a sex montage WHILE acting in it for Live By Night, but never yelled “cut,” which confused Sienna Miller into breaking character.
And finally, Olivia Colman accidentally scared Emma Stone with a wet sponge during their sexy scene in The Favourite.