Patient: 'I've got a terrible pain in my right arm, doctor.'
Doctor: 'Don't worry, it's just old age.'
Patient: 'But in that case, why doesn't my left arm hurt, too - I've had it just as long?' Full text

The senior civil servant went to the doctor and complained of being unable to sleep.
Doctor: 'Oh! Don't you sleep at night?'
Civil servant: 'Yes, I sleep very well at night. And I sleep quite soundly most of the mornings, too - but I find it's very difficult to sleep in the afternoons as well.' Full text