"Well, I was bored...."
One of my fathers friends was going out of town and he had a show horse which he asked my father (who was getting his degree in range animal science) to look after him until he got back late in the week because the horse was going to be in a parade.
The horse was a beauty. Long perfectly groomed hair, perfect form, etc. So, my father dutifully feeds the horse and checks on him each day.
Monday, Tuesday, Wednesday, by Thursday my father is officially bored. He's sat in the corral staring at the horse, and suddenly thought, "I wonder what would happen if we put Nair on a horses tail?"
Off he hurries to the store to purchase the Nair. He gets back, frantically opens the bottle, and slathers a generous amount to the horses tail. Then he waits...
Sure enough, the hair had completely fallen out by the next morning, which was the day of the parade. My father sees the tail and dies laughing, 'It looked like a finger was sticking out of its butt!"
He never did get to horse sit again.