One in adoration or in direct subjugation of the cock. Lover and tickler of the cock, the cockswain is subservient to the penis like a young sailor bound to a ship. Or one with the mental toughness to command a vessel. Used specifically in instances of sheer idiocy or submission.
Tybalt- "Drake, you are enthralled by that man's rod, i dare say you are a cockswain."
A vocation involving taint stimulation, sometimes in reference to a person or persons who truly work the taint for profit. Otherwise used slanderously to apply to underhanded individuals of low persuasion.
"Truly William, Alexander is a taintist of the highest order, for he fucked my mother, repeatedly."