It really has nothing to do with how hard a woman is spanked to get tears. I think most doms/dommes have experienced this. For me, it's always the emotional/mental aspect that will make me cry, or even more so, the shame in disappointing my Daddy/dom.
I've had extremely heavy scenes over the years where I didn't cry one tear.
Just sayin'.
Btw, this is my first post. I just joined.