Natural speed please.
I was watching my careless son walk precociously on top of the bricks of a flowerbed. Just as I thought, he slipped and whacked his groin. It was his first time to experience that pain.
He couldn't walk, and croached in that position for some time while moaning. Then he managed to get up slouchingly, but could not walk yet. I could do nothing but watch him.
Suddenly, he started hopping in place to fix "it"s position, without any advice from anyone.
I've seen similar scenes in baseball games several times, but I did not know that that kind of action was inherent in men until I saw in my son.