What has 4 legs and flies?

[captpackrat]

"Time flies like an arrow. Fruit flies like a banana."

Comments

[altivo.livejournal.com]

Often attributed to Groucho Marx. If he didn't really say it, it sure sounds like something he would have come up with.

Ranks right up there with another Marxism I like:

Outside of a dog, a book is man's best friend; inside of a dog it's too dark to read.