It has been said that a single man, between the ages of twenty-four and thirty-four, living in San Francisco, in possession of a well-paying job and an able body but not in possession of a romantic partner, can go an entire year without registering for a half-marathon, marathon, triathlon, Ironman, century, bike-packing expedition, swim from Alcatraz, or any other athletic event which tests participants’ cardiovascular endurance.