It was torture keeping himself still. Torture that Megatron would submit to every day if it came to that, and would never complain about it. He might need correction, however.

Meeting those slow thrusts with what little motion he could without breaking his position, Megatron made up for the shallower motion by twisting his hips. He hadn't felt more alive in years and it really was only partly due to the interface.

His optics flickering, they guttered offline as he arched up, charge roaring warm through his circuits, every cable and piston relaxed even when they were tense, holding him up. Being able to give himself over...

"Mmmmh. Always," that was almost embarrassingly airy, but Megatron countered with a slow roll of his hips and several brief, quick clenches of his valve, and grinned up at Orion, even with his optics still offline.