Humming quietly, both in non-committal reply - though he probably should've responded more politely to his dom - and when Orion leaned in and down and the vibrations rattled between them, Megatron didn't think anything further of that. Orion might just need to reach---

He didn't actually twitch at the pinch. Rather, the motion stayed trapped underneath his armour, vibrating along tensile cables and pistons while a surprised... noise slipped out of him.

It wasn't quite a moan, but it definitely had the underpinnings of it as Orion somehow managed to put the right amount of strength into the pinch, and place it at the most inconvenient spot, that the gentle charge already lazily spinning about and his primed sensory net interpreted it close to pleasure.

"... It appears so, yes." Somehow, he managed a more neutral tone, though faint threads of arousal still lingered.