It didn't take me long...

...to stumble upon someone effectively eating their mask.

Lots of people must be doing this daily

It doesn't seem to be very hygeinic wearing one of these infection masks, whilst eating a sandwich. If the mask has actually caught some harmful bacteria, there must be any number of ways to transfer anything from the mask surface onto the food and/or directly into the mouth.

It was only when I saw the photo that I really started to think about  some of the problems associated with masks.

One solution would be not to eat in the street - but, then, who would I find to photograph?