"A British couple after a few years of marriage finally had a child. As the child's hair was completely red and both parents' hair was brown, things looked a little suspicious. The bewildered wife, upset at the obvious insinuations, suggested that they both go to see a doctor.

The doctor, after taking note of the unusual phenomenon, looked even more puzzled than the couple. "According to the laws of genetics," he explained, "it is impossible that a man and a woman with brown hair can give birth to a child with red hair." The doctor decided to make inquiries in another direction. "How frequently do you have sexual intercourse?" he asked.

The answer was a British embarrassed silence.

"Once a day?" encouraged the doctor.

"Well, not really," was the embarrassed answer of the couple.

"Well, once a week then?" asked the doctor.

"Ahem, I wouldn't say that," answered the man.

"Once a month?" probed the doctor.

"Well, ahem, we don't - not that often," was the reply.

"Aha!" cried the doctor. "Now I get it! Nothing to be worried about - it's only rust!" - OSHO