Which magazine, On Our Backs or Playgirl, was also popular with some men?
On Our Backs: On Our Backs was the first women-run erotica magazine and the first magazine to feature lesbian erotica for a lesbian audience in the United States. Playgirl: Playgirl is an American magazine that features general interest articles, lifestyle and celebrity news, in addition to semi-nude or fully nude men. Playgirl:  In the 1970s and 1980s the magazine printed monthly and was marketed mainly to women, although it had a significant gay male readership in a period in which gay male erotic magazines were few.
Playgirl