Now have the clamps on and stand on your knees do 10 fast strokes and slap each ass cheek with other hand 1 time and slap your cock with the hand you were jerking off 2 times than again 10 fast strokes and slap and so on...repeat 10 times.
Do 50 medium strokes.
Then 10 slow strokes and after that
do 2 fast strokes and stop for very short time as you did before...repeat this 25 times