"Nooo?" Optimus hummed out, bringing the toy in close enough to slide the curved tip along the outer rim of Megatron's valve, popping and connecting charge with little crackles. He spun in around, variating between tracing the edge achingly slow and teasing the inner-most rim with quicker friction.

"But I think I do dare. You certainly did, after all."

Purring quietly in both smug satisfaction and genuine, aroused apprication for the sight laid out across his lap, Optimus slowly began to inch the rod deep inside his Highlord's valve. He took his time, wanting to see and feel every bit of reaction from the bound mech.