SWINGERS MASSACRE (1975)

 This was originally titled INSIDE AMY and is the story of a kind of schlumpy fellow named Charlie who's looking to put a little spark back in his marriage so he convinces his wife to go to a swinger's bar with the awesome name of Filthy McNasty's.  They end back at a party where some partner swapping goes on and apparently ol' Charlie can't get a hard-on under this kind of pressure.  This is the first half of the movie, for the second half stupid Chuck goes on a jealousy-fueled, kill-crazy rampage, which if he stopped to think about it for a second would realize he has no one to blame but himself.  There's no blood in these scenes since he uses boring methods like strangulation and gassing his victims in their cars but you at least get some boobs in the sex scenes to keep things a little interesting.  Sexploitation regulars Rene Bond and Uschi Digart show up in these bits.
 Sometime in the 80's this was retitled as SWINGERS MASSACRE on VHS and marketed as another of the million or so slasher movies released in that decade.  Obviously it fails as a slasher but it's at least a mildly interesting oddball look at swinging(and homicide-inducing impotence) in the 70's.  Gary Kent who starred in the actual slasher THE FOREST has a small part here as a sexy fella.  AKA SUPER SWINGING PLAYMATES