I was young when I saw this movie, so I don't remember much. It was about a psycho young guy with glasses that looked a bit like John Lennon. I remember a scene in the movie where he goes to a house where a guy and his girlfriend/wife live and then locks the guy in the bathroom. His girlfriend begged him not to kill her saying she would do anything and they start having sex. She was very loud and her boyfriend/husband was hearing them in the bathroom sreaming