Due to a complex formula not all sports that are fun to play are equally fun to watch. Even the most hard-core free diver would never indulge in a, say, four hour live broadcast of his sport. Meanwhile, it can highly rewarding to watch The Strongest Man in The World Competition, even if the idea of carrying a truck tire is not very appealing. Interestingly enough is soccer, arguably the most popular sport of the world, fun to play, but boring to watch.
We racked our brains to come up with something that is, somewhat, easy to master and fun to watch: sex and dodge ball. Sometimes dancing and boxing, too.