Optimus laughed at the joke - and after a moment even shifted to direct the ventilations from that laughter toward the closest, restrained elbow joint.

"That is an unexpected erogenous zone you have there, Highlord."

Even as he spoke, Optimus continued his tapping over the exposed paneling, alternating every few taps with a heavier smack, palm curled to keep most of the force off the more sensitive equipment.

It didn't stop the charge and static from leaping from metal to metal with each touch, of course.