It is wrong to put people's toothbrush in the toilet
Karen is brushing her teeth and sees that her son Mark has left his toothbrush on the counter again.
Karen wants Mark to put his toothbrush back.
Karen calls Mark in and tells him she will dock his allowance if he keeps leaving his toothbrush out.
Karen throws Mark's toothbrush in the toilet and tells him to retrieve it and put it back.
Mark puts his toothbrush away and remembers to do so from now on.
Mark is traumatized and grossed out, and no longer respects Karen.