Dean and Cas do freak4freak shit all the time like Dean feeding Cas water from his own mouth or Cas stripping Dean's clothes off for him after he gets thrown into a lake on a hunt while they have a normal conversation like Cas isn't arranging Dean's body like he owns it, and every time Sam tries to call them out for it, Dean just shrugs and is like "this is just what best friends do, you wouldn't know because you've never had a best friend, it's okay I never had one either until Cas, maybe one day" and Sam is like "that is NOT what best friends do!" But secretly he's like "god, maybe that IS best friends, how would I know, Dean's right, I never had one" and then Dean will stick his hands down Cas's pants because his fingers are cold and Sam will be like "I actually don't fucking want a best friend if that's what's involved"
