When someone burns you, or you burn someone, some obnoxious person in the back would yell "APPLY COLD WATER TO BURNED AREA!" Because naturally, you or the other person just got burned... See roast or roasted . It's basically just a stupid little statement to say to someone who just got burned by another person.
Kate: Luna that song is so old why do you listen to it!?
Luna: You're mom is old, but you still listen to her.
Someone from the background who just so happened to have overheard: (To Kate) Apply cold water to burned area.
Where one person (usually female) is not permitted to have an orgasmalone (e.g. through masturbation) unless permission given by their significant other, Master, etc. Often used in D/s relationships. Very hot!
Girl1: Why are you acting odd?
Girl2: I'm so frustrated and can't concentrate. My bf has cum banned me and I won't see him for another month