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According to a new survey, the average man only buys new underwear when he's about to start a new relationship. "Men only take responsibility for buying their own underwear for about 17 years of their lives. The rest of the time it falls to their mothers, and later to their wives or girlfriends," reported researchers. If you've ever wondered why men's underwear is marketed with beefcake photos of David Beckham, now you have your answer. And if come home one day and notice that your husband or boyfriend has just stocked up on a new supply of boxer briefs, yes, it means he's cheating on you. [Telegraph, NYDN]