Rogen's mall cop uses tequila to lure Faris' character into bed in the new comedy.
The actress only agreed to go ahead with the scene because she was convinced it would never be approved by studio censors.
She tells Starpulse.com, "(Director) Jody (Hill) was like, 'Okay, you guys are having sex and you're going to have some vomit come out of your mouth, you're passed out and your boobs are jiggling all over.'
"I was like, there's no way (they'll let this pass)'. There's no way. I'll do it, sure, because I don't want to be a stick in the mud but there's no way this is going to make it in the movie."
But the scene did make the final cut - and now Faris has seen the footage, she's had a change of heart: "I'm grateful, I'm grateful. I'm grateful that the movie is unapologetic."