The Prime purred his encouragement, arching against the larger with all the coy poise he could muster up; coding automatically seeking to reward the larger mech for his pleasant assistance. The hands at his hips, Megatron's own want and finally- that sudden, sharp drop at his hands?

Optimus was gone, crying out as the charge finally reached it's crescendo. It pulsed and looped repeatedly through the closed circuit made up of their frames, setting already oversitumated circuits aflame with pleasure. Keening uninhibitedly, it was all Optimus could do to keep from offlining on the spot.

And then it didn't matter, fail-safes kicking in as his systems redlined.

The Prime was well and truly out for the count.