Mila Kunis and Ashton Kutcher sat down for an interview with Jimmy Fallon on Monday night, and after explaining the story behind their charitable Quarantine Wine, they played a round of Jimmy's latest game, "Voice Swap." The game was pretty simple, but Mila could not keep it together while playing — and we're sorry to say that she was just plain terrible at it. Of course, Mila and Ashton just spent the entire time messing with one another . . . and going into far too much detail about their bowel movements. The game ended with a topless Ashton, and Mila confessing that her inability to hold in her laughter is the exact reason she's never gone on Saturday Night Live. You can watch all the hilarity go down in the video above.