It may not be just your dirty little secret as a recent survey of 1,000 people in the US by underwear maker Tommy John shows that 45% of people wear their underwear for two days OR LONGER! ICK!
Even worse 13% of respondents said they had worn the same pair of pants for a week or more! If you're looking for a particular gender to blame, the ladies can breathe a little bit cleaner as men are 2.5 times moe likely to wear undies for a week or larger.