"Sam, it's just a freaking paper cut okay. I'm not going to bleed to death". Dean shook the hand with the cut on before putting the finger in his mouth and sucking.
"At least let me look" insisted Sam with a look. Dean knew the look, it was Sam's 'I'm not letting this go' face. Dean rolled his eyes and held his hand out for inspection.
The care with which Sam took Dean's hand was not uncommon. It was the same care Sam used when sewing Dean back up after a nasty hunt. Sam brought Dean's hand to his lips and kissed the cut, eliciting a hiss from Dean at the sting.
"I think you'll be alright" smiled Sam as Dean rolled his eyes at the childish gesture.
"I think I've got one here" smirked Dean, pointing at his lips.
Sam broke into a grin showing his dimples, before kissing Dean chastely and returning to his research.