Its a genetic predisposition. Many of us would like to, but such things are sheer horror. Iv forced myself to do certain amusement park rides, hoping to get over it, but no luck. No different than some people that get sick from certain foods, or allergies. No different than the frustration of people with a learning disability trying to cope with advanced math and multitasking. Some of us would rather be in a fist/gun fight against 5 other people, or be in a burning building, or stay in a jail cell for a week. Why pain ourselves? Remember, we WANT to enjoy it, we KNOW it's safe, but it pains us still.