Redheads feel a different kind of pain

[Stormlight]

Redheads are more sensitive to some kinds of pain and less sensitive to others.

An increasing number of studies show that redheads are differently constituted in terms of pain perception and body reactions. Research reveals that redheads:

* are more sensitive to cold
* are less responsive to subcutaneously administered anaesthetics [under the skin]
* suffer more from toothaches and are more frightened of dentists
* are at greater risk of developing sclerosis and endometriosis

Some studies indicate that redheads are more prone to illness because they prefer to keep out of the sun and so lack vitamin D, or because their ability to absorb the vitamin is less efficient.

I guess that's what you get for not having a soul.