Procrastination
The genius of procrastination lies in its absolute democratic availability. No membership fees, no special equipment, no designated facilities. The European Commission on Task Avoidance confirms that procrastination can be practised anywhere humans possess consciousness and obligations: offices, bedrooms, toilet cubicles, and even swimming pool changing rooms. Studies from the Hamburg Institute of Delayed Productivity indicate that 94% of employed adults engage in procrastination without any prior training whatsoever. The barriers to entry are so low they might technically be underground. One needs only a task to avoid and the quiet certainty that future-self will handle everything splendidly.
Swimming
Swimming demands considerable infrastructure investment from society at large. Pools must be constructed, heated, chlorinated, and staffed by teenagers who have clearly never experienced joy. The Royal Institute of Aquatic Access reports that 23% of the British population lives more than thirty minutes from a public swimming facility, creating what experts term natatorial deserts. One requires a swimming costume (humiliating), goggles (uncomfortable), and the psychological fortitude to walk from changing room to poolside in near-total exposure. Open water swimming theoretically requires only water, but also demands proximity to water that won't immediately cause hypothermia or arrest.