We’re going to play a little start/stop stroke game. Green Light = Stroke. Red Light = Stop. The real fun is that you can cum if you’re stroking when the light is green, but if it turns red just as you are about to cum, that orgasm gets ruined and I get to laugh at your expense. Your cock is my toy and by making you take your hand off your cock repeatedly and leaving it twitching I can make you frustrated over and over. It would be no fun if you were just able to cum without a challenge, now would it?