Would you like to swim in the ocean, where the sharks are waiting to chomp off your legs, one at a time?
Or maybe in a lake; the alligators would love to shove you under a sunken log for a week before snacking on your rotten carcass.
The snapping turtles in your local pond hold contests to see which can snap off the most of your toes.
Come swim at the Y pool. No sharks, alligators, nor turtles. Who cares if the chlorine turns your hair green or your eyes red.
Lifeguard on duty.