Look at how much of a little obedient bitch you are.
No more pleasuring that excuse of a penis, until I say so.
Get the shoelace or string and wrap it very tightly around your testicles.
Leave a few inches dangling down.
Tie something slightly weighty to the string.
Remember to be reasonable. Nothing too light.
More importantly nothing too heavy, I want to use you again, Dog.
Check to see the lace or string is sturdy and then continue.