Pajamas are weird. There, we said it. In days gone by men and women wore strange, Ebeneezer Scrooge-style nightshirts, while we dress children up in ridiculous (but adorable) footie pajamas for bedtime. And since the average U.S. adult sleeps for eight-and-a-half hours each night, it’s worth your money to invest in a comfortable set of pajamas. In a survey, 74% of Americans self-reported wearing pajamas to bed, while 8% went commando. And in a counter-intuitive finding, men go a full two weeks before washing pajamas, while women go even longer (17 days on average). This decade, we’re seeing a resurgence…