Aside from being a loyal protector which is so important in today's world, dogs teach important lessons... responsibility (even if it's just putting out some food and the grownups do the rest)... respect (pull my tail and I won't play with you right now)... unconditional love... and eventually saying the painful goodbye...
And it's just plain fun playing games with a dog! We got Spot when I was two. She lived 14 years until old age took her away.
Now I lay me down to sleep..
Piranha girl attacks dog