Wakefield's gay, everyone. I got your proof right here.
I would like to point out that being able to make intelligent, articulate and specific comments about an article of clothing and how it fits a woman completely bypasses the chick flick cliche of the guy being trapped by the question "Does this make me look fat?" (For the record, a mismatch between the curve of clothing and the curves of the woman will make ANY woman look fat. Sadly, clothing manufactures don't use a standardized set of French curves to rate the hips, legs and other aspects of their outfits so mismatches are pretty much guaranteed.)
Such commentary also demonstrates an awareness of the plight of women when shopping for clothing. Men get inseam, waist, different cuts and a variety of other criteria when buying pants, shorts and the like. Women get vague, useless descriptions like "Size 16 Petite" that varies from one manufacturer to the next and even from one product line to the next from the SAME manufacturer. It takes women so long to shop for clothing because the initial parameters given them are vague crap.
Being able to offer specific constructive criticism means when shopping with a woman you can suggest specific things she can look for
in the next item she tries on. This means she spends less time trying on clothing that doesn't fit thus making the shopping trip shorter. When your significant other comes to see your opinions upon clothing as valuable advice, she comes to trust your judgment, which means you can easily suggest sexy attire that she'll not only try on, but be willing to wear when you tell her that yes it looks sexy as Hell.
Men, sit down and watch a season of "Project Runway" with your significant other. You'll end up with shorter, more pleasant shopping trips, a SO with more clothing that you like seeing her wear and you'll get to watch her play dress-up in vampy attire of your choosing. There really is no long term down side.