Keep it brief and then both have a break afterwards so he
can think about where he went wrong and how he can complete
a task more to your satisfaction next time.
Never underestimate your power ensure that he knows your boss,
no matter how tired he is what hour of the day or night in his
free time he must be completely at your disposal.
Doing it this way ensures that male slave training goes quite
smoothly and you will soon have a very content submissive slave
of your own!