Luke exhaled a soft laugh, head tipping back to rest against Han's chest. He took a moment, just feeling it out before he shifted his hips again, not quite lazy but still in no particular rush since this was all very nice as it was.
Once they found their position properly though, and Han had found the perfect level of pressure, Luke didn't see any reason not to press back into him a bit more firmly. He reached back with his free hand to get his fingers in Han's hair, a loose grip only because of the robotics, really. Better safe than sorry. "Yeah," he breathed out, thrusting into Han's hand, seeking out more friction, "Like that." As if Han didn't know.