Holly (Tamsin Egerton, 16) is having sex with her boyfriend Mark; when her mother forces open the door of the vehicle they're in we very briefly see her topless before the mother closes the door.
3 boys (about 6-8) seem to play with an enema in the basement of a hospital, a few shots of their exposed bottoms - first shown as stills during a slideshow and later a brief film scene when they get dressed.