Stop and Go

Let's play a game. When you see blue, pump for me. When you see pink, keep your hands off. Of course, you're gonna WANT to keep going, with how sexy I look in that hot pink shiny bikini, but you'll have to be a good boy and wait. The on and off jerking gets you so worked up, but you earn your orgasm through your obedience. I know how good I look so you must be aching for it. You can explode at the end of my countdown...