Subject: I saw this in an e-mail ... a long time ago ...
From: Veronica
Date: 30/8/13 9:50 am
To: undisclosed-recipients:;

... and my son has reminded me.

Someone has copied it and posted it up ... 'officially'??? (Actually I think you'll find it all over the Internet)

Research (at the time) showed that John Cleese actually disavows writing it ... but seems to be OK with people thinking that he did.