Then there was the fellow who was bitten by a dog but nevertheless departed
for a camping trip into a wilderness area the very next day.  The dog was
discovered to be rabid, but the man was totally inaccessible.  The critical
time period elapsed before he returned home, whereupon he was met my his wife
and his clergyman who delivered the unhappy news that he was terminal, even
though asymptomatic.  He took the news quite calmly, sat down at his desk and
began to write.  After a bit the clergyman asked diffidently, "Is that your
last will and testament, my son?".   "Not at all", said the man.  "It's a
list of people I'm going to bite."

From: Ray