A bell curve is a statistical form of measurement. Take anything, eye color, ability to play baseball, how many people eat cheese on Tuesday and you can make a bell curve.
Take any group of number of people and the majority of those people will be "same as others" regardless of what you're comparing. This is how statisticians measure normal.
When I first learned about the bell curve I spent a great deal of time trying to figure out how to make a bell, not a bell. Unless your sample of people is two or less, it's pretty impossible. So today I took a statistical measure of one person. The result looks like this: