In my experience, there's no real correlation. I'm no physiologist, but I think it probably has more to do with nerve clusters in the area, sensitivity and emotional state. I had a girlfriend that I spanked hundreds of times over the course of a few years, and her pain tolerance greatly varied. I've spanked other women, but she had the greatest sample size and obviously there was a certain point where she was adapted to it. Even then, there were times when I had to pull back because I could tell she was more sensitive that day.
That said, I do think there are body types that are generally more or less resistant to a spanking, but I don't think it has to do with bottom size. |