Julius Caesar calls his favourite general Brutus to the forum. "Brutus" he says, "you have been a great help to Rome, what can I give you as a reward"?
Brutus immediately replies "I wish for nothing than to serve Rome".
Caesar looks pleased but responds "And Rome is grateful for your devotion, but I feel I must reward you some small token. On the table to your left you will see the skin of a Nubian slave, carefully preserved and stuffed with a million smarties, take this as a small token of our gratitude".
Brutus thanks Caesar, and takes the smartie stuffed Nubian slave home with him, stuck it in a cupboard and forgot all about it for a while. One day he was really really bored, so he decided to count the smarties in the Nubian slave.
He got the slaves skin out of the cupboard, opened the mouth and started taking out smarties, counting them as he goes.
After more than a few hours he found there were 999, 996 smarties. He shook the now empty Nubian skin, looked under the table, but nowhere could he find the last four smarties. Brutus was a little bit miffed, he loved and respected Caesar but felt cheated that the emperor would short change him four smarties, so he called for his chariot and rode off to the forum.
Brutus arrived just in time to find Caesar staggering out of the forum, his toga running with blood from dozens of stab wounds. Caesar saw Brutus, staggered towards his favourite general and collapsed in his arms, uttering the now immortal words "Et Tu Brute".
Brutus looked at the dying emperor and said "Well who ate the other two then"?