A few male Facebook users have been slightly bewildered today when a lot of their female friends starting posting colours as their Facebook and Twitter updates.

Despite the best efforts to keep it a “girls only secret,” a few of us happen to have friends on the inside.  Apparently it’s a viral campaign for Breast Cancer Awareness.

The following message was transmitted through Facebook chat to female members of the site:

“I’m playing a game… silly, but fun! Right the colour of your bra as your status, just the colour, nothing else!! Copy this and pass it on to all girls…”

While it would have been nice if they had chosen someone who knew the difference between “right” and “write” to start the campaign, its purpose is worthwhile.