The frost on the windows quickly turned to steam.
Alex lay naked and panting covered in a slick coating of sweat. The sex beast had sucked him dry, he must've cum a dozen times. Still the passion in the air drove him to raise his head and struggle to his knees.
Dave laughed, and said, "Ok, your turn Alex!" The incubus shoved his long red pointed cock down Alex's surprised throat. Still Alex closed his lips and started sucking. He found the red creature lustily irresistable. "Oh, yeah, Alex, now you're getti-ooooh!"
Dave started to hump Alex's face. Alex tried to release his lips but they were locked tight. Something was happpening to Alex. Instead of demon cum filling his belly, his body was deflating, he was being sucked into the cock. Finally, Alex was sucked completely dry. His limp, lifeless skin hung from Dave's cock. Strangely, Alex's consciousness remained in that skin. And then the skin began to shrink, and darken as it shrank.
Dave laughed as he looked down at his now hooded cock. "I always wished I had a foreskin, and now I do. Thanks, Alex!" He peeled back the foreskin and looked into the tiny green eyes leering over his cockhead. That was the only indication that Dave's demonic foreskin had ever been human.
Suddenly, Dave was hungry again. He licked his lips, and with a hand wiped a peep hole in the steam covered glass. The exchange student had only whet his appetite, no he wanted more. Looking out he saw...