Zaphod100's massive cock twitches as he gets caught in the act, masturbating to porn. His thick, veiny shaft throbs, pre-cum dripping from the tip as he furiously strokes, oblivious to the prying eyes. The voyeur, hidden, watches entranced as Zaphod's balls tighten, ready to explode. Suddenly, a gasp gives him away, and Zaphod, embarrassed but aroused, freezes mid-stroke, caught red-handed with his big dick in his grasp.