[MarkNDoubt]

Mouth training:

Put on a stopwatch and use the blindfold. Add clover clamp to nipples and 8 pins for each nut.

Using your M dildo, perform 4 sessions of 5 minutes each of drooling blowjob (don't suck). After each session 30 seconds of break. Time will have to be managed in your mind.

At the end of the session, remove the blidnfold and stop the stopwatch.
The minutes of difference (both more and less) will used to stay to kneel on the rice with a coin held with the forehead on the wall.

Good luck.