Obi-Wan twitches when Harley's finger pokes beneath his ribs, but he manages to stifle his laughter right up until the moment Klaus gets under his shirt and into his waist. Then the sound that slips out of him is very undignified, especially for a Jedi Master, something between a giggle and a snort as he tries to twist away from the prodding fingers and finds it impossible.

With one hand on Harley's leg, he uses the other to try and bat away her hand, then Klaus's, unsure who's going to attack next.

Never before in his life has he ever been in a situation like this. That makes him laugh as much as anything.