There’s nothing quite like the invigorating bliss of running through the spray of a cold hose on a hot summer’s day. Under the age of 5, it doesn’t matter whose company you’re in—just toss the clothes for the instant refreshment of a nude karate kick through the arc of a backyard sprinkler. For most adults, however, the idea of stripping down au naturel for a backyard frolic might sound too childlike, even potentially illegal. Happily, it isn’t. What’s more, installing an outdoor bathtub can turn the duty of bathing into a stimulating and sensory event.

If fun isn’t enough, consider doing it to save the planet. The average indoor bath consumes 30 to 50 gallons of water—all of which usually finds its way into the treatment plant. By installing a bathtub outside and using a biodegradable soap like Dr. Bronner’s, you can put your bathwater to good use, nourishing your garden and yard plants. And a diluted soapy solution may even be a natural way to ward off aphids. How many indulgences are so clean and green?