At a recent convention of biological scientists, one researcher remarked
to another, "Did you know that we have switched from rats to lawyers
for experiments in our lab?"
"Really?" replied the other researcher. "Why the switch?"
"There were a number of reasons," the first researcher explained.
"First, our lab assistants don't become so attached to them. Second, lawyers
breed much quicker, making them far more plentiful. Third, animal rights
groups have no objection to their torture and fourth, there are some things
even a rat won't do."