I only ever saw the movie knock off. I thought it was hilarious. I never lived in the 70s though am not sure what it was really like, except for those bad, bad fashions, like flares. That tried but failed to make a comeback.
Apparently the number one paperback at the moment is Colleen Hoover 'It ends with us' and is basically about a love triangle ...again. The blurb sounded like a recycled plot to me. Two guys and one girl and the gal has to choose. Why not have both? Because the two guys dont like each other right so they fight to the death. But they both like the girl. Makes sense, no?