I've never been bit by a corn...but I got bit by a sub-adult red tail boa...and yes, it hurt...alot. But a boa's teeth are MUCH larger than a corns, and the strike is much more powerful.
I think, and I've said this before, that the fear of being bitten is ingrained in the human psyche. It is a natural fear response, regardless of how little or how much it is gonna hurt. Knowing that it will definitely happen at some point, and it will definitely be less painful than I am anticipating, doesn't remove that fear 100%. It helps me to not worry about it, and not be focused on the fear, but it's still there...and probably always will be.
My ex was nervous about me getting the snake for our daughter when I first got our corn. She actually got pissed, asking me how I could get a snake, what if she gets bit, what was I thinking, blablabla...But when I brought up the kitten she had at home, and all of the scratches and bites my daughter was getting from the kitten...she had to drop the argument. I would rather get bitten by a colubrid than a cat any day of the week...