Obi-Wan was indeed having fun. He enjoyed negotiating, especially to create peace for an entire planet. However, when the planet was extraordinarily hostile, things tended to not go well, and several breaks were needed in order to keep peace at the peace negotiations. So they stopped for lunch at a slightly sleazy diner with a scowling Yuhhnjktian across the counter. Anakin groaned. "I don't want to eat here."
"Anakin stop complaining."
"You were the one complaining earlier,Master."
"I was not complaining, Anakin, I was simply saying that I was thirsty because we'd been wandering the desert for hours."
"Sure."
Qui-Gon looked on them with amusement. He seemed to be enjoying himself.