Re: perfectly tanned faces
Or, to add more possible meaning, most people don't tan evenly from just being out in the sun. We have lines where our sunglasses were, where we applied sun screen unevenly, etc. If someone has a perfectly tanned face, they probably did it in a tanning salon, so in addition to their (possibly) fake smiles, they also have a "fake" tan. They are make sure their outward appearance looks perfect. But we don't know what's going on inside.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.