Why do we wear protective glasses in factories

This is a tricky question.

I was told when I visited Mini BMW Oxford days ago by a gentleman who showed us around.
We have only one pair of eyes but many pairs of glasses, that is why. Good, isn't it?

Like my MSc course director said to us once:"Listening is even more important than speaking in communication that is the reason why we have 2 ears but only one mouth".

I like this as well.

We got to listen to others, we got to love and protect ourselves; to protect those ones we love and to love and protect the enviroment feed us.