Why are women posting their bra color on Facebook?

I don’t check Facebook as much as I used to (because I’m working hard, hey boss!) but when I checked this afternoon, I noticed that all of my female Facebook friends, from various locations around the country, were sharing the color of their bra.  Why?  Apparently to raise breast cancer awareness.   The meme was apparently spread by the forwarding of a Facebook message that read:“Something fun is