Genetics may explain why redheads apparently differ from those with other hair colours:
Research into the way redheads react to various substances and stimuli has produced a catalogue of differences that defies easy explanation. They are more affected by some things and less by others. This has led scientists to theorise that the cause of these differences is likely to be something fundamental: redheads may possess a “redhead” gene.
I’m not sure if this is saying much though as I would have thought all people are “more affected by some things and less by others”, but let’s not be making too many assumptions.
Redheads have a reputation for being feistier than others, and there may be some truth in this. Scientists are gradually piecing together a picture which seems to indicate that redheads are constituted differently to other people.
Well they might be onto something there. I’ve always known I was… different.