I remember years ago on Max a regular poster commented about how he had been kicked in the balls during a session and suffered a serious injury which caused an emergency room trip and permanent damage if I remember right. It took me years to work up the courage to try this partly because of this post. There is some risk in a lot of bdsm activities and this is certainly one of them. I think I’d only engage in this with someone I’ve played with before and trust or in a first session someone who is experienced with a really good reputation which I have done with Michelle Lacy and Jean Bardot.