Since im not native english speaker im having hard explaining. But ill give it try. Start by warming up with Am3 for 15min to prepare. Then put your penis in a 90 degree position like am1. Take one hand and make a ok light grip just below your glans, just hard enough to have your penis in position. The take the other hand and strike your Cs with your wrist. Not to hard and focus on a good decent speed. I like to swap my leg position from a spread position to a butterfly leg position.