"Hey guys, quit it!" shouted Dustin, but it was too late. They had already pulled his pants down twice, and he felt the underwear that he was wearing become too tight, too quickly. His bulge began to swell up to monsterous proportions, but unfortunately for him, his underwear managed to remain intact, so his rapidly expanding nuts and his huge horse cock began to be be squeezed very painfully in his small underwear. "Guys, stop!" he shouted, in extreme pain from all the tightness of his underwear, and the slow crushing of his balls. The twins smiled evil grins, and then the managed to pull his shorts back up over his package, and then down again....