"Any specific problems you should tell me about?" the doctor asked.
"Well, I have noticed lately that if I get even the tiniest cut, it seems to bleed for hours." she replied. "Do you think I might be a haemophiliac?"
"Well," the doctor answered, "Haemophilia is a genetic disorder and it is more often found in men, but it is possible for a woman to be a haemophiliac.
Tell me, how much to you lose when you have your period?"
After calculating for a moment, the lady replied, "Oh, about two hundred pounds a night, I guess."