"I'm touching myself, imagining it's your fingers," one types, her heart pounding. "I'm so wet," the other responds, her breath hitching. Their messages grow bolder, more graphic, until they're exchanging naked selfies and masturbating together, even if it's just on the other side of the wall. The tension builds until they can't take it anymore, and they meet in the hallway, their hands and mouths eager to make up for lost time.