The horse and the goat complement each other and make a harmonious team. They can have strong friendships in real life. The optimistic horse appeases the goat's fears, while the goat helps bolster the horse's confidence. The goat teaches the horse patience and empathy, whereas the horse teaches the goat adventure and spontaneity.
The phrase "get your goat", comes from the practice of English horse trainers using goats to calm their racing horses before a race.