What film? Comedy with hypnotist at the start

I saw a comedy a long time ago, I've been trying for many years to remember what it was. I only recall the first scene - To be honest, it was funny at the time, but that first scene is pretty terrible. A not particularly attractive man seems to be having sex with an attractive woman. It comes to an end and it transpires that he is a pro hypnotist and she is under hypnosis for something personal, but he is completely using her body whilst she is under then makes sure she does not remember. Terrible scene to be honest, but I'm just dying to know what the film was???