Voyeur in the locker room.

He decided that this was it, he had to see under these girls' clothes. He had never seen a girl entirely naked before, excepting that one time at the beach he saw that nude old lady, but that didn't count. He was going to see hot girls, naked, now! His cock was hardening in his pants as he ran down to the girls' locker room, cutting his last class to spring his plant into action. He snuck into the locker room through a secondary entrance to avoid the gym teachers and found a small alcove set off to the side that contained the largest lockers, just barely big enough for Greg to fit into. By the time he locked himself away in one, his cock was at full mast, straining against his pants.