"Nothing is stopping you from getting more," Optimus objected, optics narrowing. He wasn't starving any more, but he wasn't topped off, either.

"Obviously, not even me." He gave the cuffs another pointed jangle, eying Megatron's advancing hands.

And 'all night'?

"...What are you even plannin-" The touch made him interrupt himself with a loud, startled rev, but that nip made him jump, sputtering static.

"Nzzn- S-seriously?"

Of course Megatron had some elaborate plan. He should have known. But he didn't know what to make of a plan that, so far, seemed to consist only of 'tie up Prime, do kinky things to him'.

...Tired or not, he couldn't really object. Though given the sharp sensory feedback from his too-delicate antennae, he was lucky he could even speak.