Bare feet are the best way to feel the balls, both with high kicks and steps. In this clip I kick without mercy, there's no use asking to stop, I kick from behind and from the front, to feel the balls burst in my instep. When it falls to the ground, I crush it with my fingers, to feel the eggs between them, squeezing and squeezing until it becomes an omelet. It is a delight at the end of a session like this to see the damage I caused. Poor balls.