Haven't you experienced it?
I have.

We are never so proper in our conduct as when everybody can look and see exactly what we are doing.

If you are off in some distant part of the world and suppose that nobody who lives within a mile of your home is anywhere around, there are times when you adjourn your ordinary standards.

You say to yourself, 'Well, I'll have a fling this time; nobody will know anything about it.' If you were on the Desert of Sahara, you would feel that you might permit yourself--well, say, some slight latitude of conduct; but if you saw one of your immediate neighbors coming the other way on a camel, you would behave yourself until he got out of sight.

The most dangerous thing in the world is to get off where nobody knows you.