A girl went off to college and found that some of her classes were so far apart that she had difficulty getting from one to another on time, so she sent her father a letter asking for enough money to purchase a good bicycle.
By the time the money arrived, however, the girl had found a boyfriend who had a car and whose schecule was such that he was able to shuttle her back and forth between classes and so, instead of spending the money on a bike, on impulse she decided to buy a pet monkey to keep her company when the boyfriend was not around.
A couple of weeks after she bought the monkey, it began to have a problem with hair loss. So much so that the hair was literally coming out in patches. So, in her next letter to her father she said "Dad, all the hair is coming off of my monkey - what should I do?"