Finally the proof I needed
Dr Thiswont Hurt
Harley Street
London
To whom it may concern
This has cost Francis Burnet a great deal of money and is to certify that he suffers from an extremely common genetic condition caused by the absence of the so called “Green Gene” on the Y chromosome.
If you should mistakenly serve him salad you might have to use the Heimlich anti-choking manoeuvre as illustrated below

Yours in the money
Dr T. Hurt
[Specialist in mens' problems by appointment of His Royal Highness Prince Philip]

