Horses don't feel the need to say stupid things that they think you haven't heard before. Horses are happy to see you the next day.
Horses have better table manners.
You are not embarassed to be seen with your horse in public. If you get rid of your old horse, he does not slash the tires of your new horse's car. Horses don't play golf. Horses don't spend the entire Wimbledon tournament channel surfing for glimpses of Anna Kournikova when the Williams sisters are battling it out.