with everything Sean said, but would add the further category of "glamour", which IMO is different than fashion or beauty (as Sean well described them). Glamour, unlike fashion, IS selling the model. Whether its a B/W celebrity portrait, or a bikini babe on the beach, or lingerie, or a nude, or some old fabric wrapped around the model, if the purpose of the shot is to show off the model (which IS what you're seeing in Maxim, et al) than in my book it falls into the category of glamour, even though magazines like Maxim DO try to use trendy fashions, because they get them for free (on loan to the stylist). For example, stylists working on a fashion shoot usually have to use current "fashionable" clothes, and make sure they look good so they'll sell (whether in an ad or as editorial). Stylists working on a glamour shoot can use anything - or nothing - they want, whether its in or out of style, from competing manufacturers, worn as intended or twisted and torn up. The whole point is to make a statement about the person, not the clothes.
Regards,
Andy Pearlman
Andy Pearlman Studio