parents asking their teenage children for for rent

German here. I enjoy bashing US Americans as much as the next one, but paying rent to your parents is something I had to do after finishing school with 19 (did a social year first and then went to uni and had to share my Bafög). And a lot of people I knew back then, had the same situation at home. At least for families with low income this seemed to be not out of the ordinary.