yeah, the sex thing, Dean would be absolutely NO NO NO. but a kiss? perhaps an angsty PARTING KISS in midst of hellfire (okay, i need to lay off the brie) and horror? i don't know, fic writers would be able to come up with something suitably dignified and consensual...

although Dean could totally get whammied by some kind of lecherous demon and have GRAPHIC SEX DREAMS about him and Sam. would the show be able to get away with that? I WANT TO SAY YES.