So our swim teacher still wears a mask (yes, in the water. She has a collection of them and changes them as they get wet). I asked her why, and she said that teaching kids she would constantly be sick. Ever since covid and she started wearing a mask, she has not been sick. So I get it, she has a good reason, she doesn't want to be sick. However, our bodies are made to be sick and fight it, that's how we get stronger. She's retiring anyhow, so I just roll with it. She's a good teacher, way too liberal though.