I've subscribed to GQ and Details, and looked at other fashion magazines, and they are useless. They just show outfits, or particular items, and pile superlatives on them ('snazzy', 'retro', 'bold', 'understated', etc.). But they give no clue as to why one thing is better than another.

One theory to explain this is that women have some kind of holistic thinking that lets them make use of this kind of information - that by just looking at a bunch of examples they can pick out what the rules are - and that fashion magazine writing culture teaches how to write for women.

Useful writing on fashion for men is mostly about suits, which I avoid as much as possible because I hate wearing a tie.