That's an idea which stuck with me, and I brought it into parenting - why did I want to be a mom? Not the pretty reasons about loving someone else but the reasons I wasn't really comfortable with. Reasons having to do with me, my ego, my desire to be powerful and in control, and my fantasies about how cool I would be, how much my kid would love me because I'm just so awesome. Not exactly pretty stuff! And it has been true that those less-than-noble reasons are bound up in my needs - and as such, they're guideposts for meeting my needs; my personal needs and my maternal needs.
It's not popular to talk about maternal needs. I think sometimes there's a fear that admitting to those will diminish us, make us something less-than. I remember how shocking it was to first read advice on an unschooling list to smell my child's head as a way to relax. It seemed weird.