This time I was really bad with my partner, I tied his arms around his legs and made him stay with the balls tied and attached to a hook, he was immobile in that position, I gave him a warning:

I will crush your balls tied with my beautiful bare feet, you will have to come to get out of there, and when I realize that you are excited I will kick your balls until you cum, I will only stop when you ejaculate.

And this is what happened.