I laid down on the floor, she took off her shoes. Using the ball of her foot she felt around for my nuts which felt wonderful. when she found them, she rested her heel right on top of my testicle. Just the weight of her foot resting on it caused great pain. It felt like it was going to pop. Then she told me to close my eyes, when I did she lifted her leg as high as it would go. Then her heel came crashing down on my nuts with a tremendous amount of force. It hurt like hell, but I enjoyed it at the same time. I have had a fetish for it ever since.