What does it mean?
We laugh easily at other people's bad luck, but the same thing doesn't seem funny at all when it happens to us.
Who said it?
Will Rogers: American humorist and actor (1879–1935). Source: The Illiterate Digest (1924).
Funny– Will Rogers, The Illiterate Digest (1924)
“Everything is funny as long as it is happening to somebody else.”