Is it redheads? Or Native American redheads? I’ve NEVER gone under easy in the dentist’s chair. They give me time for the numbing to take effect and I scream when they probe. Yah. WRONG sedative!
They hated to see me coming. Worse yet, the teeth had hooks on the roots, so it had to be oral surgery. But they never told me why until it was over. Idiots. They could have saved a lot of time and effort if I had just known...
Apparently teh mutated gene responsible for red hair also inhibits the function of anaesthetics.
The degree that it does it somewhat varies from person to person.