How long did you stay?
<5 minutes: bad, 10 hard slaps, 10 hard punches and 10 smaks whit paddle, of course hard.
>5minutes: good, stroke 20 times.
Go now on the hard surface, sit on your balls, pull them back as hard as you can and sit on them, pull up your legs and put all the weight of your body on top of them.
Bounce a little bit, it hurts? Needs to.
Stay for a while, take the time, you have to stay at least 2 minutes, continue as long as you can.