The startled noise that came from Dean was something he'd be embarrassed about if it wasn't for the fact Sam had seen him in almost every way, shape, or form. It still sucked that his little brother could get a noise like that from him.
"God damn," he gritted out through clenched teeth as Sam tugged his hair like that, and his hands came to grab hold of his brother's shirt. This was Sam's answer to what he said, then? Well, he supposed actions spoke louder than words. He could just hate himself for this after they were done with... whatever they were going to do.
It was fast becoming obvious Dean wasn't used to being with guys, his hands feeling useless just holding onto the back of Sam's shirt as he let the much taller man kiss him.