Will Ferrell admits using prosthetic testicles in 'Step Brother'

In a hilarious Reddit AMA, Will Ferrell has opened up about his film 'Step Brothers' testicles rubbing scene, saying that they were prosthetic.

The 46-year-old comedian that Daniel Day-Lewis had allowed his balls to be examined for the prosthetic testicles that were used in the scene, News.com.au reported.

Ferrell added that it is no joke, as those testicles were worth 10,000 dollars.