I have been brought to tears with caning (that shit hurts!), but never from just OTK. I may not be the best example though, because when I sub, I'm all about pushing my personal limits. I could care less about the power exchange, and I've never understood the humiliation aspect that some feel is important. I enjoy bottoming sometimes to see just how much pain I can withstand. I will say this, if you're gonna take a true beating, after-care is extremely important, because you're pretty much worthless afterwards. My first time, I was shocked at how much it physically took out of me. But, I slept like a baby that night (on my side...).