Which Hurts More?

Eva and Ginger are curious is ? painful for a slave, being whipped or having their cock shocked. They are curious purely for scientific purposes of course, to understand method of pain is ? effective when applied to the male gender. The experiment seems to yield interesting results as both the whip and cock shocker make the slaves yell in pain, but it’s not clear to them is the ? effective tool. Looks like testing must continue to gather More? pain data from their male test subjects, for science of course.