He hasn't lost his sense of humor. It's just that he doesn't have many reasons to use it except for when FH is around, but he doesn't expect Kate to reawaken this side of him. So when she starts laughing, more amused than scandalized and thoroughly in on the joke, he feels as if he's accomplished something important. And that's a great feeling.

"I'm usually more polite in the company of a woman, but I think we've moved past the point of polite," he says with a wry chuckle.

After all, she did try to dry his nether regions with a blanket.