Keep yourself as close to the edge as possible. Use one finger, slow strokes, I don't care, just do not make a mistake.
Before the revolution some men would fuck for a living. They were the first to be made an example of. The first public ball whippings were back then, groups of them were lined up and punished for all to see. By this point, every man was little compared to a woman in court. Harsher sentencing was the next logical advancement.