Well there is more to Playboy than that...used to be anyway. Good lord Ray Bardbury and Asimov both have wrote for the magazine-- for an example. Playboy has, for the most part, always been about the "Playboy lifestyle" and people aren't interested in that much anymore.
isn't porn. It's glamour photography of nude or semi-nude subjects. It's just not in the same category as magazines like Penthouse