Some people might think - Ewww, gross! While others might think - hey it saves me money and wear and tear on my undergarments.
According to a recent survey by The Daily Mail, almost 1 in 3 men wear their underwear 2 or more times before they wash them...
On Thursday, tennis star Serena Williams briefly changed her Twitter avatar to a photo of herself wearing only a bra, panties and high heels.
The photo's tasteful lighting prevented her 2 million Twitter followers from getting too much of an eyeful, but it still managed to draw the ire of Sporting News columnist Greg Gouch.