A jagged molar: my secret weapon?

[Hopeful55]

I have a genetic defect in one of my molars that allows me to scrape my toungue against it as hard as I want without the slighest outward sign (jaws can be obviously tightly clenched).  It's not as painful as biting my toungue would be, but its completely undetectable.  Think it could work as a CM?  or is it not painful enough?  (if I push really hard its probably a pain equivalent of licking a sharp piece of obsidian.)