Sometimes, just because you can do something doesn't mean you should do something. Example: Toe wrestling, which is basically arm wrestling for the feet. Do we really need this? For those of us who don't have a foot fetish, looking at feet (especially a dude's feet) is kind of gross. So why would we want to watch a bunch of guys rub their feet together until one foot pushes another foot down for three seconds? (Short answer: We don't.)
If you want to find out more about this nail-biting sport, click here.
A real nail biter.