Concentration
You can do these tasks right the first time, or we can go on repeating them if you're really too afraid to comply. I've got all day.
Your Mistress wants you corrected, and correction you will get! Now.... You can give 20 hard, full blows to your balls, or we can go on all day while you 'tap' on those nuggets over and over. This really is your choice now... one of the last choices you will be able to make. Maybe you want me to take a running kick at your crotch instead? No? Well then let's try it one more time...but this time you will time yourself. 20 HARD ball smacks in 10 seconds. Oooh I want to see you squirm and ready to sing an aria... even dubbled over from these hits! If you'd done it right the first time, this wouldn't be happening. Ready? Go!