A woman I knew bought some gay porn mags for a bachelorette party, as a goof. I leafed through them, and will testify that gay porn and Playgirl are worlds apart. Playgirl is very classy and restrained compared to real gay porn, which is somwhat pedophilic and, ahem, peni-centric.
It kinda traumatized me, and never again will I go into the produce section of a supermarket in San Francisco. Yuck.
Playgirl was known to be a men's magazine because it was formally looked into. Playgirl Mag was a chance for males that were not flamboyant to buy a magazine that offered a fig leaf.
I have a friend that was a career navy man who I suspected of being homosexual from almost our first meeting that bought (and kept purchasing) subscriptions for his wife who was not interested in it at all, he claimed it as a sort of permanent gag gift.