the "three second memory" myth was most likely originally concocted to make people feel less guilty about putting them in tiny bowls. i remember hearing as a kid that "their memory only lasts three seconds, so by the time they swim around the bowl they think they're somewhere new!"
So remember, when you're feeling very small and insecure,
How amazingly unlikely is your birth,
And pray that there's intelligent life somewhere up in space,
'Cause there's bugger-all down here on Earth.
Loki/Grendel/Gail/Beowulf/Camilla/River/Bathory/Arwen/Lafayette/Deb/Jack Skellington (soon)