Johny,
It is pretty simple and rewarding, that's why many do them.
Grab your flaccid unit, thumb in or out, and pull down.
Pull till your comfort level bell goes off. Now with a good rhythm,
swing stressed to the right back down and to the left and backdown
touching you flaccid to your thigh each time. Caution this will sometime
get you a little erect. I, personally , continue through the semi erection
but I don't know if it is really good to do so.
Each right to left or left to right and down counts 2. So 2,4,6,8, to ~
try 100 to start...damn telephone...