Thrust up into your hand 50 times slowly. We want to feel that cock between our tits.
And you, premature ejaculator, may continue on the endurance test normally, following the above instructions.
The deserter however, you have some pain to suffer through.
50 cock slaps, increasingly harder with each 10.
50 ball slaps, same as above.
Flick the tip of your cock 50 times.
Stroke only the tip 50 times fast.
Squeeze your balls for 50 more tip strokes.
You will cum again.
I want you to build to that with only stroking your tip. Then you may leave.