Hold on a second, while we're on the subject of tactical Cas...
We already know he can heal people without actually making skin-on-skin contact, and that he touches Dean just because.
But consider asking Dean to let him take his temperature in 11x10.
He could identify that the dead guy in My Bloody Valentine had a bladder infection by sniffing him. He diagnosed a hernia in a baby from a distance.
He also just had his hand on Dean's face.
Of course the Doylist perspective is that this is a funny gag, sure. But the Watsonian perspective here is that Cas is a crafty little perv (if you think it's meant as a rectal thermometer), or that he thinks he can make a breakthrough in Dean's walls by getting a finger in his mouth.
The choice of words with "let me" also....I mean great asking for explicit consent, but it also betrays that this is something he specifically wants to do.
Weird timing in context, but evidently Cas won't pass up an opportunity 😂.
