It's true. My happiest part of the day is coming home to pet the dogs. Why? Because they love you. They always love you.
As silly as it sounds, I think we could learn a lot about the love from a dog.
Simply put, a dog will adore you... not matter what. If you scold them, they'll remember it only when they get close to doing something horribly wrong. They forget it almost immediately and don't carry it with them, waiting to use it as a reason to stop loving you.
If you're sick or sad, they'll snuggle up next to you to keep you warm and comfortable.
If you're angry, they'll give you your space until you have calmed down.
I think if we loved like a dog, maybe there would be less drama, and less drama makes me happy.
Therefore, happiness equals unconditional love equals less drama equals warm puppy.