sex curtains

Curtains placed around a bed, usually in a dorm room. They add a feeling of privacy between what is going on in the bed, and what your roommate and/or other people in the room can see,hear,smell,feel etc.

Curtain sex is when you come home and you see a penis sticking out from between the curtains. Instead of calling the police like a normal person, you flick it, suck it, then insert yourself on it.