Unlike in the commercial, people ARE sharing their crescent rolls, and gladly, too. The latest fashion trend is to show off your doughy butt cleavage, in what is called “underbutt” shorts. Rihanna famously exposed the trend with a revealing tweet of her bum. Though her shorts showed more full bun, than crescent sliver. And Miley Cyrus followed suit with the "cheeky" shorts that are becoming popular.