This is probably the one thing you DON'T want to hear your ex-husband joking about - especially not in front of the world.
Katy Perry is likely to be fuming today after Russell Brand joked he was thinking about other people while the pair were having sex.
The ladies' man reckons he was close to becoming a monk when his marriage fell apart, insisting the two institutions are entirely similar.
He told the audience at one of his London shows: "When I got divorced, I considered becoming a monk. When you're a monk, you're not allowed to have sex with anyone.
"When you're married, it's one person. That's one more than a monk. It's not that different. I'd be having sex thinking, 'Think of anyone, anyone else.'"
[ Katy Perry says she's not dating R-Pattz, in fact, she farts in front of him ]
Katy previously admitted she struggled with Russell using their relationship as part of his stand-up routine, adding that it was part of their downfall.
She said: "[He was] a magical man. He's a very smart man, and I was in love with him when I married him.
"[He was] hysterically funny in some ways. Until he started making jokes about me and he didn't know I was in the audience, because I had come to surprise him at one of his shows."
Yeah, we're assuming this won't help then....