Earlier, while bored on a train, I asked Twitter what their favorite one liner jokes were. This one, from @TomWalsham was unquestionably my favorite. If anyone knows who originally came up with it, please let us know in the comments or via email.
Update: The joke apparently did the rounds last year when The Atlantic tried to establish who first came up with it, no conclusive answer unfortunately.
There are more great finds from around the Web every day at TNW Shareables.