I really don't like it. If someone tells me that their child is 'clean', meaning that they're toilet-trained, I think it has negative connotations. So if the child isn't toilet-trained, is he/she therefore 'dirty'?
It reminds me of medieval times when menstruating women were 'unclean' and lepers had to go around shouting that they were 'unclean'.
I just don't like it. I would never want a child to think that anything about him/herself was not clean....
Yuk. AIBU?