I can't tell you how much it turns me on that you've made it this far without cumming. I love a man with self control. So, let's put it to the final test.
First, hide any clocks (just trust me). Then, lube up that palm.
I want you to start slow, and every 20 strokes, increase the pace a little, for 200 strokes without stopping. If you can do that for me without, I might just let you cum.