Cliffjumper had turned around enough to be able to glance at Optimus, and caught the tail-end of the Escort wiping himself down and then the fluid rifle-check. He twitched, and, embarrassed that watching the mech check over his weapon kind of... affected him... turned away.

"Unfortunately. I'll just have to make it as hard as possible then!" Cliffjumper grinned right back, only ducking playfully away from the touch when Optimus had mostly finished the motion already, because it wasn't as if he - as he'd found out - didn't like his bodyguard touching him.

Quite the opposite, in fact.