A man realises that his migraines, back pains and excruciating testicular agony that have plagued him through his whole adult life have been getting progressively worse and more constant. He goes to the GP, who refers him for further tests, and it's determined that he needs to undergo a long course of extensive brain surgery, invasive spinal corrective procedures and a double orchidectomy.
After 24 months of hospital appointments and seemingly endless surgery, the man is feeling no better whatsoever with the head and back pains and is greatly struggling to come to terms with the loss of his undercarriage. Devastated, he figures that he's just going to have to learn to live with it - battle the pain and get on with his broken life as best he possibly can.
Previously, he worked as a builder, but, knowing that he can't possibly return to such a physically-demanding job - as well has having them all laugh at his new squeaky voice - he resigns himself to an enforced change of career and he applies for an office job, for which he gets an interview.
Realising that he doesn't have any smart clothes to wear, he goes to the local specialist tailor and tells him that he needs a really well-cut suit for his big interview. The tailor says "Understood, Sir, we will get you the perfect outfit, I am fully confident. Right, then, let's start with the trousers: looking at you, I can see that you're a 38 large, so we'll go from there."
The man laughs and says "No, that's completely wrong - I'm a 32 small, always have been."
The tailor replies "I don't wish to cause any offence, Sir, but I have been in this business since I was 18 and I'm now a grandfather. I tend to find that I know my customers' bodies even better than they know them themselves, and I recognise the huge importance of correctly-fitting clothes. In fact, I could tell you with certainty that, if I were to let you leave here in a pair of 32 small trousers, I guarantee that, before the day is through, you would be suffering from debilitating migraines, horrendous back pain and your testicles would feel like they were permanently on fire...."