Now before we get started, let's get you naked!
Uhh I love it when I can bust the balls of a little boy with a little dick.
Now I want you to get something to tie your balls with, a shoestring or something like that.
Now tie your balls so that they are a bit away from your body, real good and tight, but with a bit of string left when you are done. We would after all not have them slip, now would we?
Now take the bit of string that's left and tie your balls to a chair. I hope you choose a heavy one *grin*