Scott Disick's Changing Chicks Like You Change Underwear

Scott Disick has a revolving door policy when it comes to models hanging poolside ... but one thing they're all down to do is show off their asses.

Scott cozied up to a blonde Tuesday at the Setai Hotel, the day after he was chilling in exact same spot with a different woman.

We broke the story ... Scott's fling with model J Lynne was temporary -- as in 24 hours. With his one-and-done policy in place ... expect to see a new face butt next to him tomorrow.