First Kim Kardashian put her sizable behind on the cover of Paper magazine ... then a pregnant Kourtney Kardashian followed suit for Dujour.
But this is not who we thought would bare their butt next.
On Sunday night's episode of "Kourtney & Khloe Take the Hamptons," it was Scott Disick who revealed his rear while wearing a pair of assless chaps!
So ... how the hell did that end up happening?!?
Earlier in the episode, Kourtney and Scott made a bet whether Khloe would commit to her newfound love of horseback riding -- watch that clip below:
Once Khloe found out about the wager though, she was ticked and got her revenge by gifting them the pair of chaps and a leather whip. Weird punishment, yes, but Scott was game and proceeded to put on a jock strap, the chaps ... and nothing else.
Kourtney was not amused. Are you?
The couple welcomed their third child, a baby boy, before the new episode aired. Congrats to their growing family!