Optimus purred, immensely pleased his little trick had worked. Which is why he had to immediately try it again, twitching fingers against a different circuit line and varying the tingling shock.

"I try to be a quick learner. When I can. When it is...ah, interesting."

He laughed quietly, leaning down further over her shiny-wet frame, armor squeaking with the contact. "Which probably explains a lot of my failings with protocol."