Favorite place to kiss you.

Dean:
Lips, it really shows other people that your taken and he's not afraid to hurt those other people.

Sam:
Forehead or top of your head. He's very tall so it's an easy spot to just show a little affection for the girl he loves.

Castiel:
He likes to kiss your cheek. He never truly understood the whole human love thing, but when you first met, you kissed him on the cheek and that's what he does. Despite what the pizza man does.

Adam:
He'll kiss your hand. It makes you and him feel important which is something you both need.