My favorite horse joke, which is also a true story:

My wife and I were watching the annual Fort Worth Stock Show parade one year.

As the Paint Horse organization rode past on their beautiful mounts, my wife noticed that one of the paints was very shaggy.

She asked, 'Why does that horse have such long hair?"

I replied, "Obviously, that paint needed a second coat."

One of my all-time best comebacks, I think.