I am a people watcher. I like to observe folks going about their day. Mask usage when sick might be a good thing for society overall. But the way people wear them, fiddle with them, touch them, use them for days at a time, are problematic against the benefits. Our nasty little hands and the lack of hand washing is more consequential than the mask (generally speaking). If you ever get the chance to have someone incubate a petri dish of agar after swabbing your cell phone, or keyboard, you should let them. And that's the stuff only you touch. Imagine all the surfaces touched by thousands that you touch without a second thought.