PumpJack McGee wrote...
Call me old-fashioned, but I grasp the turgid truncheon with firm grip, and proceed to oscillate my hand at great speed until ejaculate is propelled in quantity from within.
This process is repeated until the protrusion no longer stands with vigor.
You have forgotten to advise the students to alternate between the left and right hands, when levels of physical exertion render the further exploitation of the oscillating appendage inefficient until rested for a short interval of time.
I my self am a left-handed operator when in default mode. Ambidextrous capability is present.