Accidentally hurt my brother badly. How do I make it up to him?

I was chilling out in front of the TV before school today when my older brother decided to wrestle with me. It was funny, but things went bad really fast when he pinned me. In my struggle to free myself, I accidentally kneed him... really, REALLY hard... right in his... you know. The privates. His boy-parts. "Down there."

He dropped to the floor and started rolling around, holding them. I felt TERRIBLE. I thought I'd totally smashed his berries. He kept asking me why I'd kick him there, and I said it was an accident, but he didn't believe me.

Anyway, it obviously hurt like hell and I feel like crap for attacking his manhood like that. If I could un-kick them, I'd do it in a second.

Is there any way I could make this up to him? I'd let him kick my testicles back if he had any. I guess I could let him kick me in the vajayjay, but there has to be a less painful solution.
Accidentally hurt my brother badly. How do I make it up to him?
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