I noticed a girl at church today who was wearing shoes with incredibly sharp metal heels. They were so narrow they looked like needles. I am sure she must have left some holes in the church carpet.
The National Trust (an English heritage organisation) has a rule that if you visit their properties and you are wearing heels smaller than a postage stamp, you have to change into slippers. The heels this girl was wearing looked smaller than a pencil point.
Fortunately, I know her parents do not allow shoes in their house. Very sensible people.