Random idea of the month: Anaesthetic toothpaste

Every so often I come up with a random idea. Most will never go anywhere, apart from on this blog, where I offer it up freely for consideration.

How about pre-school children's toothpaste with very mild local anaesthetic included. The idea being that: when they're teething and hate the idea of anyone poking their teeth, then the act of brush their teeth relieves the teething pain.

I can think of at least one reason not to do this, feel free to add yours in the comments.