Phobias

Is it normal to have them? If so, how many would you have to have to be considered abnormal?
I was thinking today, while watching my 7 year old freak out because he got his sweater and longjohn shirt stuck, halfway off his head. Maybe, just maybe, he has inherited my intense claustrophobia.

As a kid, I was scared of everything. The dark, small spaces, bugs, dogs, dirt. I think it was part of an escape mentality I had to help me cope with my unhappiness. As I have gotten older, things have gotten better, somewhat. My childhood phobias have been replaced by more adult phobias.
I still don't care for the dark or small places but I can cope with them, when I need to. I don't panic instantly or cry.
My top 3 phobias are as follows:

Spiders- any and all. No matter what size or color, they are all evil. I hear people keep them as pets. I only like to see spiders in my home if they are on the bottom of M's shoe and smooshed. Someone once told me that the average person eats 5 spiders in their lifetime while sleeping. I think that statement says it all.

The dark- I have had this phobia for as long as I can remember. I have outgrown the thought of monsters hiding in the dark, waiting for me. But I prefer to keep a nightlight on, which I do.

Elevators, small cars, tiny areas- again, had this phobia forever. Not sure why I feel this way but I won't put myself in a situation where I have to take an elevator or ride in the back seat of a small 2 door car. I will sweat and panic to the point of hyperventilating. Its not a pretty sight.