Prepare a shoelace, or string, and start stroking.

God, don't I look so good, so shiny, and a little bit evil? Doesn't it make you weak?

Well, I do have a surprise for you. Just as you started to get warmed up, STOP. Stop and tie your balls up, just as I instruct you to. Watch as I tie up this dildo - I want you to do the same thing to your dick. Then pick it up, and turn that stroking into jerking. Faster, riding the edge but DON'T CUM. Don't cum until I say. Wait. Wait Wait on the edge. Not yet. Not yet. Not til I say.