As might be expected, he doesn't have the most socially acceptable reasons for looking vaguely smug and contemplative.

I'm having fun/shuddering imagining what those might be...

"Not 'socially acceptable'? Well. That depends on the society in which one places oneself, does it not? And may I remind you that the making of omelettes does require the breaking of at least a few eggs."

HEY, what are you doing in my head, creepy Huin!Mairon?!?