Kappa underwear?
 

I was just looking at Victoria's Secret online, and they have some cute undies with Kappa symbols right now - in the VS Cotton collection, there's some with light blue fabric with keys (and locks), and in the VS Pink collection, they have some with fleur-de-lis... they're cute!

I'm relieved! For a minute there, I thought you were going to bring up the thongs with letters that I saw in several college bookstores this spring.

Ha ha, no, this is a little more subtle than lettered thongs!

Sadly, I went to pick some up (you can never have too many pairs!) and they had no fleur-de-lis or key patterns remaining... I'll have to keep an eye out at other Vicky's.