Good point, spark. I have had quite a few clients go the same way and usually it involves less interest in pain and more in the mental - just like you. So, you are not alone.

I too have had my personal limits shrink. I used to participate in things just for the experience, not because it was an actual kink of mine. I now have limits regarding blood play, age play and a few other things that would just make me feel like I had a bad job if I did them by request.