There is a story of identical twins. One was a hope-
filled optimist. "Everything is coming up roses!" he would
say. The other twin was a sad and hopeless pessimist. He
thought that Murphy, as in Murphy's Law, was an optimist.
The worried parents of the boys brought them to the local
psychologist.
He suggested to the parents a plan to balance the
twins' personalities. "On their next birthday, put them in
separate rooms to open their gifts. Give the pessimist the
best toys you can afford, and give the optimist a box of
manure." The parents followed these instructions and
carefully observed the results.
When they peeked in on the pessimist, they heard him
audibly complaining, "I don't like the color of this
computer . . I'll bet this calculator will break . . . I
don't like the game . . . I know someone who's got a bigger
toy car than this . . ."
Tiptoeing across the corridor, the parents peeked in
and saw their little optimist gleefully throwing the manure
up in the air. He was giggling. "You can't fool me! Where
there's this much manure, there's gotta be a pony!"