When I was a junior in high school, I had to write a big research paper on phobias. A phobia, by definition is an irrational fear of something that is harmless that interferes with your daily life, not to be confused with fear, which is rational. I wonder what is the most popular one of them all. Mine is spiders, I can't stand them at all... looking at them, dealing with them, having them crawl on me. What's your phobia?