Female led relationships discussion

My wife has started applying deep blue to my testicles during our disciplinary moments. She makes me take it off every time just for the mental aspect, but it’s becoming more routine now that I’ve received this treatment three times in the past five weeks. It really burns and lingers, which I dislike, especially since washing it intensifies the discomfort.

I’m wondering if anyone else has experienced this as a type of punishment? Does one application feel worse than another? I suspect Icy/Hot is the most intense, though I’m not entirely certain. When they apply it to you, where exactly does it go? My wife usually puts it on the underside of my scrotum, right in front of the base ring. Last time she went over the ring, and I was terrified she would keep moving upward, but she stopped there. It’s hard to picture how bad it would be if this stuff ended up near the sphincter.