reasserting manhood (closed to Selene. NSFW)
After living through Dean's prank, it wasn't that Sam was feeling insecure. He knew he was viral. And straight. It was just that, well, maybe it was the caveman part of him or something that wanted to kind of prove it. But somehow, doing it with one of the women Dean had told lacked appeal (obviously). And there was Selene, who's cool body his hands already knew. So after sending his brother a message about not coming home, Sam went knocking on Selene's door, his heterosexuality first and foremost in his mind.