The belfie is a delightful portmanteau of butt and selfie. As the nomenclature bourgeoned, so did the practice. Every time we opened our feed, there was another perfect posterior, beckoning you to oogle before giving it a double-tap. The more that famous faces turned the camera away from pouty lips to plump bottoms, so did regular sexy women, those without reality shows and record deals, all to equal applause. Bring on butts of all shapes, sizes, and colors.