That's a good boy.
Does degrading yourself for me turn you on more?
Do you want to endure more pain for me?
Ha, I bet you do!
Say it out loud.
Tell me how you'll suffer my punishment to demonstrate that you're worthy of serving me.
Mmm. That's nice.
Now, lean in towards me.
I want you to stroke your cock with one hand and squeeze your balls with the other.
Slowly increase the pressure on your balls. Keep squeezing!
And when it really starts to hurt, I want you to plant a dozen kisses on my ass, and say "thank you" between each kiss.