"Yes Sis, your boyfriend kicked me in the balls because he doesn't want me to look at your tits. Do you want to kick me in the balls while I look at your tits again? And please don't tell your boyfriend."
"I'm so glad you want to dominate me. My balls are going to hurt, I know that, but I'll happily get on my knees with my legs apart so you can kick me in the balls."
"Yes, my ex-girlfriend kicked me in the balls while breaking up with me. The reason she broke up with me was because she caught me licking and smelling your dirty panties. So, she thought kicking my balls was a fitting end to our relationship."
"Can I make two requests. I would like to kneel down and look at your tight jeans as you kick me in the balls, but before that I would like you to knee me in the balls while I have my hands on your hips and look into your eyes."
"Yes and I was hoping that you might need the practice, so I am volunteering for you to kick me in my balls, you can even tell me how you want my balls positioned for your pleasure"