ffinochio I read the OP as it as written. There was nothing in it to suggest the OP was not serious. What a strange wind-up?
I agree with you too, by the way!
Our first DGD when two was (we thought) definitely OCD!
She enjoyed cleaning but would take things, like slippers, the cat's bowl and the biscuit tin (plus lots of other things she could carry) and line them up in perfect columns side by side, across the rug in the living room.
Now she is older all that has gone and her mummy has trouble getting her to tidy her bedroom or clean up after herself! We bought one of our dgs a little dustpan and brush set for his birthday as he too loved grabbing the big broom and sweeping the kitchen floor and nearly putting everyone's eyes out in the process!
It seems like a natural part of child development and play to me.