As children, my wife and I both grew up with dogs in the house. But, we'd never made the commitment to take care of a dog in our adult lives.
We had cats, three of them. Still do.
We also have children, three of them, under the age of 6.
So, with three cats and three kids in the house, why not get a dog, too? It had to be a puppy, of course, so that it can learn to live with those three cats and three kids.
Thus, with the expression of a proud parent, I introduce Charlie. He's an Aussie/Border Collie mix that my wife managed to find at a sort of local rescue organization. He's awesome. And, in about twelve months, it's my understanding that he'll be old enough to begin training as a running partner. We have to get past house training first, though.