The burly mechanic, his thick arms grease-stained, can't help but notice the effect the day's work has had on his body. He retreats to the privacy of the parking garage, unbuttoning his shirt to reveal his muscular torso. His hand finds its way to his crotch, rubbing the growing bulge. With a grunt, he frees his massive cock, eight inches of veiny flesh throbbing in his hand. He jerks off, his grip firm, his strokes steady, until he's groaning, his cum spilling out, coating his hand and dripping onto the concrete.