That was a bad move by the captain he tought, there are better ways o make her squirm that don't put her life at risk.
he puts on a plastic glove, both to protect his left hand from the electric shocks and from the oiment on a flask in his right hand.
It is a paste made by the grinding of nettle leaves.

He smears a generous amount all over her body where flesh could be seen, from toes to thighs, several servings at her crotch, her arms, and the parts of her breasts that were not wrapped in plastic.

On the way down the stage he stopped, almost forgetting to give the other girl on stage a taste of what the new device was.