“Stupid” questions thread

r/​Fit­ness does a weekly “Moronic Mon­day”, a judg­ment-free thread where peo­ple can ask ques­tions that they would or­di­nar­ily feel em­bar­rassed for not know­ing the an­swer to. I thought this seemed like a use­ful thing to have here—af­ter all, the con­cepts dis­cussed on LessWrong are prob­a­bly at least a lit­tle harder to grasp than those of weightlift­ing. Plus, I have a few stupid ques­tions of my own, so it doesn’t seem un­rea­son­able that other peo­ple might as well.