Originally posted by Godsize
Imagine you are holding a garden-hose at one end. The rest is lying on the ground. Now imagine "whipping" the hose, sending a hump "rolling" down the length of it. Can you visualize that? Of course, you wouldn't be whipping anything like that. You're sort of bending, then "pushing" that bent section down the length of your dick. You can't be too hard or you won't bend shit. It really helps to see it.