SONKAJARVI, Finland -- I'm less than halfway through the World Wife Carrying Championship course when steroids suddenly make a lot of sense. Everything is going fine until my wife and I hit the water hazard. It's 3 meters deep, about 30 feet long and there is a fireman in scuba gear standing by in case of emergency. By the time I wade its length, I'm so exhausted that we do not so much step from the pool as evolve out of it, like the first amphibians to leave the oceans and crawl onto land. We switch from the traditional piggyback...