Wow, taking me back! My first porno flick from back in the '70s, back when I got instant woodies all the time. Saw it on a friend's home movie projector in 16 mm. We were given the film by a guy and his wife who were swingers. This could be a short version cut to fit on a 16 mm reel.
There are 4 scenes with female-to-female sex, plus a final scene with 8 females, all 5 scenes with no men. For a "straight" movie, that's well above average for FF content. I think "stupidheads" lived up to his name, and he has retired now.