Two scientists were discussing their latest behavior modification research. "We've started something new," said the first scientist. "For some of our more dangerous experiments, we're now using lawyers."

"Lawyers?" queried her collegue. "But we've always used rats."

"Well, you know how it is. You get so attached to rats."

From: W. Novak & M. Waldoks, The Big Book of New American Humor (HarperPerennial)