I watched this film in the  mid-1990’s, I think, where this guy realizes his girl friend is going to another guy’s apartment.  This guy has lots of women coming and going, which construction workers outside watch and cheer about. The boy friend goes to the apartment to find out why this guy is seeing his girl friend.  It turns out the guy is coaching her and these other women to have orgasms.  The boy friend asks to be taught what the sex coach knows and has to learn things like holding his xi and how to find his girl friend’s Gspot. Very instructional!

Does anyone remember what the film is called?  I’m trying to recommend it to a friend, but I can’t recall anything beyond the plot.  Thanks!