No way! This little event in their lives does not give Dean freedom to crack one out whenever the mood took him. There were some things Sam really didn't need to see, and Dean getting hot and horny over Busty Asian Beauties was one of those things!
Sam knew his brother well enough to pick up on his nervousness, so he grabbed a handful of Dean's hair again and pulled him into another firm kiss. Focus on the easy parts. Maybe the rest would magically take care of itself?