Disgust Could Keep You Healthy

People who are easily disgusted are less likely to get sick (colds, stomach bugs, infections, etc.), because they are acutely aware of their surroundings and have a hard time touching things that they know have been touched (infested!) by others.

Germaphobes Unite! (just don't touch me)
The Hoff

Source: That's Disgusting: Unraveling the Mysteries of Repulsion, by Brown University professor Rachel Herz