Teeth brushing 101

Jonah is learning to brush his teeth, but really all he does is chew on the toothbrush.  He's required to sit on the bathroom stool while he "brushes," otherwise I find him brushing things that shouldn't be touched with a toothbrush...the sink, the floor, the mirror, oh, and bath toys.  After he spends a few minutes chewing on the bristles, it's my turn to finish up.  He doesn't like this part which is evident by the fight he puts up by hand over hand hitting.  I usaully have to hold him down on the ground in order to get the toothbrush in his mouth.  Don't worry, we both come out giggling in the end!