Optimus keened, eagerness both foreign and familiar coursing through him at the sight of spark-light not his own. Even in his days as a Consort, he hadn't felt such desire to share his spark. His body was one thing, but his spark... No coding could control or force that.

But now, it was a pressing, maddening desire. A Need, important enough for the Matrix to be pressing itself on his consciousness heavily, reenforcing that requirement.

It was important for Them, for their to be a Highlord and Prime.

Yesss yes yes, now...

Cables pulling taunt in every tightly-joined opening, he used the retractable, articulated tendrils to tug them together, arching up to scrape chest plating against chest plating, sparks flaring hot and blinding with proximity.