File:Women running in pink underwear during Cupid's Undie Run.jpg

Runners took to Folly Beach for Cupid's Undie Run

Health DO or DON'T: Runningin Your Underpants

PHOTOS: Cupid's Undie Run Philadelphia 2013

The fourth annual Cupid's Undie Run-Detroit

Charity runners will drop their pants for a good cause

Kona Images: The 2010 Underpants Run – Triathlete

Runners take to the streets in their 'undies' for a cause

Images: Hundreds run through downtown KC in their underwear

Runners strip for Cupid's Undie Run at The Abbey in West H…