I found this interesting article online today that engages with the issue of gendered clothing, and how it can have the effect of deepening the socially constructed and negative aspects of gender division.
Now, before some of the cranks on here rubbish the idea out of hand - I ask that you actually read the article first (it's very short). It does NOT call for the universal application of unisex clothing - simply the emancipation of all clothing of its gender grounds and the abolition of stigma either way.
It's an interesting area of study, and one that is often taken for granted or overlooked even by LGBTQ activists. Clothing is and should be a powerful expression of who we are - why do we allow society to tell us what is and isn't appropriate in that sphere?