He licked his lips absently, having to force his eyes away from Sam for a moment. "Dude, what is it with you?" His tone came out a little more harsh than he intended, but he was a little freaked out that his own cock was half hard just from watching his little brother trying to get off.
"Okay, fuck." He felt like a pervert even suggesting this, but... he also didn't want to linger around in Sam's sex dreams for forever. Maybe it had to be someone else doing it or maybe he was all wrong and it was just because Sam couldn't get off with his big bro in the room. Guess they'd find out. "Close your eyes and hands off, dude, on the bed."