Did you have to leave marks behind at all? What - a reminder for when you go? [He was about ready to turn and leave, give Dean some privacy to clean up... but then Dean was giving him that look and making that challenge.]

What? For real? [Now doing stupid things drunk... that was excusable. This was giving his brother a hickey fully sober and aware and... what he should have done was call his brother an idiot and go get dressed. Instead, he was still staring at Dean, frowning a little as he debated what to do.] You're an idiot, Dean. And this is like, the least sexiest way to offer this.

[And there were a lot of reasons he and Dean shouldn't be sporting matching love bites, but he was leaning in anyway, one hand tangling in his brother's hair while his mouth found the other's neck. His movements weren't exactly confident as he liked, but... he wasn't exactly confident about this, whatever they were doing.]