Jul 14, - For most of us, a trip to the beach means sunburn, spilled cocktails, and a sandy ass crack. Seriously, who isn't washing sand out of their ass. Jan 24, - Kourtney Kardashian Flashes Her Butt In Thong Bikini On Vacation — Challenging Kim? Kourtney Kardashian’s behind looked absolutely fabulous in a bare all pic from her vacation with bf Younes Bendjima. Although Kim is the one in the family most known for her full backside.