Flats are such a practical and comfortable shoe. What we now call a "ballerina flat" was one a unisex shoe in the middle ages. Korean men have a traditional shoe that is very similar to women's flats in the US. See this link:
http://www.china-cart.com/d.asp?a=Traditional+Hanbok+Korea+Shoes+for+Men&d=15301I started wearing women's flats because I have a high instep and they are the only shoe that does not rub the top of my foot. Now I wear them all the time. Thanks for a great post and promoting a practical and comfortable shoe style for men.