I go hiking - barefoot - on the mountain trails near my home. On warm days I just wear a pair of cutoffs, nothing else. I'm barefoot and shirtless. The sensation of the sun on my body and the feel of the ground beneath my bare feet are awesome. The cutoffs make it easy to play with my ever-hardening cock.
As I walk through the woods I slowly fondle my boner that's sticking out of my pant leg, using the palm of my hand to rub the precum all over my cock head. There's a rock outcropping near this particular path that overlooks a small ravine. I sit on this rock, my cutoffs hike up my ass somewhat and my cock and balls drop out onto the warm surface of the rock. I sit there, pinching my erect nipples, drop spit on my hand to lube my cock and stroke it so my nuts start to bob up and down on the rock. I work myself into an unbelievable orgasm and shoot ropes of cum down into the ravine. I've got pecker tracks all over the edge of that rock. This is one of my favorite masturbation spots but it's near the trail and I do have to be on the lookout for other hikers.