They were still connected; Megatron noticed the distant flicker of programming in a way as "activating but not affecting self", and the reflected meanings he got from it made a smirk ghost over his lips and his hands tighten on Optimus' hips.

That would be delightful to use once he had a chance to, for now, he was quite... satisfied to... Self-dicipline and lack of energy both kept his hips still as Optimus rose himself off his spike and then dropped down.

Stifling the groan, Megatron twitched his hips in a part-cicle just before Optimus' weight dropped fully down on him and made it hard to do a more complex movement like that. But the effect was what he wanted, as at the same time current snapped into place again and pleasure rushed up, making his hips twitch upwards, the earlier motion had made all those tiny little mechanisms slide along and then snap into much too tight and perfect place.