What’s more natural than the human male sex organ? Whether you’re on a majestic mountainside, off the beaten trail in the woods, at the seashore, or just sitting on your own back stoop or backyard, let your cock out to feel the air and get some sun. The sun will expand your member like a lizard sunning itself, and the breeze will tickle your nutsack into an erection. Your penis craves the outdoors. Give it what it wants.