This movie was probably from the 70's. There were 3 men who went to a bachelor party. They hired a hooker and while one of them was having sex with her in the bathroom, she was stabbed by the hook on the back of the door. They disposed of the body and "got away with it" but had to live with what they had done. I can't remember the title or any of the cast. Please help.

Don't know of a film like that from the 70's.

Is this it?

Very Bad Things (http://www.imdb.com/title/tt0124198/)

I think that would be it. Thank you very much.