It'd definitely been an eye-opener if nothing else. Sam would never be able to look at Dean moaning around a mouthful of pie the same way ever again. He'd also learned Dean was big on nails digging in and hair pulling. And a talker. It shouldn't surprise him really. Dean talks through everything else, so why not sex?
The kiss is ...nice. Far nicer than it probably should be. There should probably be more panicking and freaking out. But instead Sam is happy to melt into the kiss.
And hey, on the plus side, at least they've solved the never-ending argument over who gets the first shower with the hot water and who gets the cold, second shower. "Don't be long. Hot water doesn't last long." Sam pressed another quick kiss to Dean's lips. "Put itching powder in my boxers again and I will end you."
He forced himself off the bed, ignoring the protests of his muscles and made his way to the bathroom.