Just Wondering

It's Mother's Day today, and to celebrate I did a few loads of laundry (I guess I wasn't trying very hard). Our washer and dryer are made by Miele, a German brand. I always use the "extra dry" dryer setting, and it just occurred to me what a stupid setting that is. All I ask of a dryer is that my laundry end up dry. What exactly is "extra dry"? How is it possible for something to be extra dry? And why do I choose that setting? I guess I feel that by choosing "extra dry" I'm increasing the odds that my clothes will actually be dry. Michael uses the "normal" setting. I guess that means he's confident that his clothes will get dry without incident. But me? I don't have that kind of faith. In fact, I often inwardly cluck my tongue when I see Michael use the "normal" setting. "Silly man," I think, "his clothes will never get dry that way."

But isn't this really Miele's fault? Why have an "extra dry" option if "normal" could get the job done? Thanks for nothing, Germany.