I've figured out why shops have sold out of toilet paper and it's not because the public think it a magical cure.
It must be that most people only ever go to the loo at work!! They just keep one roll of paper at home for special occasions.
If they have to self isolate they'll have to go at home, so need to buy extra. No more clenching of cheeks all weekend and then spending most of Monday morning in the work toilet, they'll have to use their own facilities.
You mark my words, toilet brushes will be the next shortage!