Slowly, Optimus pulled the cube away, just out of reach. But still close enough for the scent of loose energy particles to be smelt, cube glowing enticingly.

"Well. You don't have to have any, you know."

It was a thoughtful, musing question, only partially teasing. It was the truth, after all. Megatron did not have to refuel if he was not hungry.

There were other options, but only if Megatron refused to bend first.

He tapped his hand along his Highlord's spinal struts, waiting. Alternatives could be just as fun as this option, after all.