"Ah--!" Tarn bites off a cry of pleasure as Pharma rubs his charge-swollen nub beneath his knuckles. His hips jerk as he tries to push harder into the stimulation.

His valve clenches, swallowing the Autobot's fingers eagerly in it's wet heat

"The effects fade, but only immediately after overload. When they return I'm more charged up than before." Tarn squirms a bit before bracing himself on his elbows to glare at the doctor fingering him.

"Is that all you've got? I must say I'm disappointed-- I had imagined that you might have a bit more enthusiasm in you."

He's trying very hard to not let on how desperate he is for an overload.