Phobias tend to cluster around common themes ... exposures where people do things that are either out of the normal or silly. So that people get exposed to the fact that they can feel embarrassed ...
Phobias come in many different forms. Acrophobia is the fear of heights. Aviophobia is the fear of flying. Felinophobia is the fear of cats. Myxophobia is the fear of slime. Xyrophobia is the fear ...