A Smile's Worth

I should be eating dinner right now, but I'm typing this instead. Aren't I loyal?
Moving on, here's today's question: What is a smile worth?
It really depends on who's smiling, to be honest. If there was a traumatized little boy who wouldn't smile or speak, a single word or a single twitch of the lips would be worth a lot of time and effort and love. If it's your best friend, maybe it isn't worth as much because you see them smile all the time, but once their smiles are gone, you'd give a lot to have them with you again. If it's some sadistic creep who's smiling from the joy of causing pain to others, then that's not worth a ****. Sometimes, there's a person so smiley and sweet that smiles don't mean much from them, but they do have a smile for everyone.
It also depends on who's receiving the smile. If you're a neglected child that hasn't had much love, a caring smile might be all you need or want. If you're someone who's smothered to the point of suffocation, every smile might seem fake. If you're the sadistic creep (and I really hope no sadistic creeps are reading my blog), then smiles directed at you might cause you an urge to wipe them off the person's face. If you think you're worthless, you might not think that you deserve a smile.
What is a smile worth to you?