How to Make a Merkin, a Fake Penis and More Raunchy Props in Hollywood

Other for-the-laughs merkin cameos include Heidi Klum's heart-shaped number in 2001's Blow Dry and Anna Faris' gigantic one in Scary Movie in 2000.

Male actors also get a lot to choose from when it comes to showing off their junk in comedies.

Just ask Chris Hemsworth.

Before filming last year's Vacation reboot, the Thor star tried on a variety of dildos for a scene in which his character shows off his massive bulge in a pair of boxer briefs. "We went bigger, bold!" Hemsworth said. "It was embarrassing, hilarious and probably more for other people than me."

But who needs a sex toy when ya got household goods on hand. John Cena's fake peen in Trainwreck came from the props department.

"Jimmy was our prop guy and he was whittling [the top of a broomstick] one day. I was like, 'What you doing, Jimmy? What you working on?'" Trainwreck star Amy Schumer recalled. "He was like, 'I'm making John's erection.'"

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