My old girlfriend form High School her parents use to get it on while we were there. After dinner they would just up and go to their room and lock the door and leave us to clean up the dishes and such and we would just watch tv. A few times we went to the door and could hear them going at it. The thing that really pissed us off was that her and I couldn't be in her room with the door closed or even laying down next to each other to watch a movie. I thought it was kinda of messed up that they would go ahead and have sex while we were their and we couldn't watch a movie with the door closed in her room