The Journal of Social and Personal Relationships once published a study which found that pet names are very healthy for a relationship. Pet names signify that a couple feels close enough to develop their own language and culture. This is an example of positive communication, which makes for a happy relationship.
Think of any close romantic or non-romantic relationship in your life. I bet you (and I'm no gambler) that you can think of a pet name or nick-name that you have been given or have given to someone else. My best friend/college roommate and I have countless nicknames for each other. Some of these names are more endearing than others, but they've all grown from an event or a detail that we've experience in our history together. When we use these names, our positive relationship is reinforced.
Simon and Garfunkel and even John and Abigail Adams had secret names that they used when communicating with one another.
What pet names have you given/been given?
In the spirit of pet names, I'd like to dedicate this post to my pet.
The happiest of 25th birthdays to you, boo-boo-boo-boo-boo.