"Why do some kids have three parents?"

A group of our friends were spending a weekend at a cabin in the mountains, and our hosts' not-quite-three-year-old was starting to do the math. Over the squalls of nap-resisting toddlers, her mom responded without missing a beat: "Because they're lucky."

Living in a committed multiple-adult household always takes some explaining. In a nutshell: My wife and I were college girlfriends and had a commitment ceremony more than ten years ago. Our husband joined our family in 2001, and we had a three-way wedding in 2005. We own a house and car together and are equal co-parents (or as equal as you can be when one person is breastfeeding) to our one-and-a-half-year-old daughter.