These two images from The Sartorialist, shot in Milan and Paris, really caught my eye. I think that a backless piece is just as sexy, and maybe even more, than showing off cleavage (though I'm sure a lot of guys will disagree with me here). How I wish it was still summer here where I live - I wore way too few backless pieces during the holiday season, and now I have huge regrets.
Image Source: The Sartorialist