About five years ago, I wrote a blog post titled "The 'Social Obligation Smile'". I'd written the title down in my sketch notebook to remind myself to someday do a sketch about it. Re-reading my old post shows me just how cynical and sarcastic I used to be (I'm definitely mellowing down). However, I still believe that this is a highly useful skill in societies/cultures where social interactions are strangely superficial and yet extremely fundamental.
Also, this could probably help the sharks with their public image, right?