Facebook Colors - Why is everyone posting colors on facebook?

Facebook colors - dingy nude, black, clear, blue, pink, yellow, green, cheetah print, etc. Many Facebook users, particularly men, were in thoughts what could this random colors in the women's update status could mean.It was later found out that these colors represented the favorite hues of bras.

So why is everyone posting colors on Facebook? This is a PR tactic for Breast Cancer Awareness.