How long have you been there?
-1/4 minutes: emh maybe you did not understand, it's my absolute favorite practice, come back and redo the exercise
-5/7 minutes: mh not bad, but still not good, another 2 minutes, then 50 hard slaps
-8/10 minutes: Congratulations you did well, go ahead.
-11/15 minutes: great treasure, give yourself 50 strokes of prize
-15+ minutes: Oh my God what have you done? You have really exceeded my expectations, congratulations you too like it? do some more if you like it so much ...
Wow I had a lot of fun, but we still have not finished the session.
Now an important question, is your cock still hard?
-Yes: great go ahead
-No: I hate to repeat myself, and I warned you too many times, come back to page 5.