An innocent young man from the city went to the country and visited a farm for the first time in his life.
He wandered around the property and was amazed at how big the cows were.
After walking about for a while he saw the farmer walk by and he called him over.
"Sir", he inquired, "why doesn't this cow have horns?"
The farmer cocked his head for a moment and then began in a patient tone, "Well, my boy, cattle can do a powerful lot of damage with horns. Sometimes I keep the horns on cattle trimmed down with a hacksaw. Other times when young calves are born I put a couple of drops of acid where the horns would grow and that stops them cold. As well, there are some breeds of cattle that never grow horns."
The farmer then finished by saying, "However the reason that this cow doesn't have horns is because it is a horse!"