Why do some people stop watches?

When I was a kid I couldn't wear a wind up watch.....it would stop within a half hour and not start again until someone else wore it for awhile. I am not on drugs, not claiming to be psychic, no seizures or anything like that. This has always been a curiousity of mine......is it healthy? Could I be more susceptible to some illness or more immune perhaps? I also don't have any fillings...never ever had a cavity. (it is like I am immune to them) I didn't even brush my teeth all the time when I was young and ate as much crap as anyone else. Hey, maybe getting fillings changes the electrical field in your body? Just two weird things I have always wondered about.