Kids say the most amazing things...
Son #1 (Sidney) just made the observation, as I was tucking him into bed, the following...
"How come the Simpsons on TV drink Duff beer, and in the war Simpson's donkey was called "Duffy". Isn't that funny!" 
He's right. I'd never made the connection before! For those international readers who do not know about our WW1 "Simpson & his donkey", check it out
here.
HH