Orion hardly needed to will the vibration to spread, because it was doing exactly that. Orion's tongue dipping inside made a two-point contact for the vibration, creating two interlocking ones... and setting the delicate workings of the valve moving, making them twitch and flex in return.

All of which had Megatron tense against Orion's mouth, but he wasn't moving. The charge gathering along his valve along with the tension in his frame set his sensor nodes alight and wound the contained tremble higher.

"No." Then he laughed, slightly airily as he kept his vocaliser from glitching with static as it wanted to do from the way his sensor net was flush with bright pressure. "I'm... out of practice. I am perfectly capable of longer... better, than this." No bashful pushing away of the compliment, merely Megatron adding a fact of his capabilities even as his voice dipped down into a rumbling waver.