He probably shouldn't laugh, but he did so anyway, and the smile after was lazy and warm as he obligingly finished the motion Orion's tugging had started, wrapping his hand around his own spike.

"If you say so," Megatron said with a tilt to his helm and arching one optic ridge as he gave a single tug, opened up his hand to tap the head with its bared connections, then trailed his fingers down along the spike, hitting each ridge, before he dropped down lower, trailing around the rim of the valve.

Static charge spat along his fingers from every single little slide, jumping between the ridges in his spike to follow his fingers down, and then crackling along the rim with his fingers as he hitched his hips up slightly.

Not quite a thrust, not quite a blatant offering either.