CG,
Most doms won't admit it (And I am giving away a trade secret here) but we are fascinated with color, especially reds and blacks and blues. It is sort of like a bull with a red cape. We just go straight for the source and start ripping at the fabric to get to the juicy bits underneath.
It is all so dull and Scientific really. A lot of study has gone into the phenomenon.
*Okay it is certain now. I REALLY need to get a life*
*cackles madly*