The point of masks is not necessarily protecting the wearer from other people but other people from the wearer of the mask. It's kind of an unselfish and consid

The point of masks is not necessarily protecting the wearer from other people but other people from the wearer of the mask. It's kind of an unselfish and considerate thing to be wearing a mask: you might be infected without knowing and exposing others around you. A mask reduces that risk. If everybody wears a mask, you effectively have two layers of protection. A potentially infected person wearing a mask would mostly not be spreading the virus very effectively. Their mask would catch most of their droplets. Your own mask then reduces the risk further. If either of you doesn't wear a mask, the risk is much higher. If nobody wears a mask, higher still. It's not rocket science.