A common comment related to my blog on mask-wearing was that people missed seeing other people’s smiles. It’s understandable that we feel this way. For example, when someone smiles at us, we smile back. Now, with the need to wear a mask, others can’t see our smile and we can’t see theirs. Perhaps without the prompt of seeing others’ smiles, we may be smiling less, which may have the effect of compounding a negative mood.