"Back in March 2021, George appeared on a 'SmartLess' podcast together and detailed the situation, noting that he would routinely clean up after Richard's cat so that he would think the feline is constipated. Richard, of course, knew none of this.
'And then he takes the cat to the vet, and they give him this kitty Metamucil,' the 'Ocean's 11' star said on the podcast. "And so now this little kitty is s——- 15 times a day, and I am scooping it all up, because I have nothing else to do, I have no idea why. It's just funny."
"The light bulb, you know, goes off, and I realized what I must do, which is take a s— in the cat box,' George explained. 'He's in there for like a minute, and I don't hear anything and then, all of a sudden, I hear, 'Oh, my God! … I come in and I just, tears coming down my eyes, I'm laughing, and slowly he figures it out.'
Richard didn't think it was a laughing matter.
'He gets madder and madder and, finally, he's like, 'I understand humor. Defecation doesn't make me laugh,' George recalled him saying."
~ Mark Gray
"Matt Damon reveals George Clooney's most disgusting prank" | Wonderwall.com
https://www.wonderwall.com/news/matt-damon-reveals-george-clooneys-most-disgusting-prank-681561.article