Dungeon Damsel
Guard
You make a very good point and I suppose that a trained interrogator would know that. My nipples when aroused send waves of exquisite pleasure through my body when licked or suckled by a partner or caressed with my own hands while masturbations. A shock of energy from electrical clamps would be extremely excruciating and I would break very quickly I am certain.
I've not really tried electricity yet, but from the descriptions I've read it sounds horrifically painful. it must be very hard to hold out against it, which I guess is why it's used so much in real life torture.