The solo exhibitionist's heart races as he enters the bustling public restroom, eyeing the closed stall doors with anticipation. Slipping into an unoccupied one, he locks the door, his cock already hard and straining against his jeans. He withdraws it, the cool air a stark contrast to the heat of his desire. His strokes are slow, deliberate, each one pushing him closer to the edge. The sound of someone washing their hands outside the stall sends a jolt through him, and he quickens his pace, his breath coming in ragged gasps. With a final, desperate stroke, he comes, his cum coating the inside of the stall door in a lewd confession.