Pah, as much as I prefer dogs to most people, I feel I haveta stand up for my fellow sisterhood 'ere.
1- dogs wont do your laundry- which involves beating balled up socks against a wall before you put them in the washer.
2- dog's won't run to Boot's for your medicine when you've got man flu.
3- dogs wont run you to casualty when you've had yet another DIY disaster.
4- Dogs wont politely laugh at the joke they've heard 1000 times before.
5- Dog's wont act as your personal PA or secretary when an important call has to be made, usually to somewhere official.