It's such an insidious assumption--heck, up until a few years ago, I always assumed I'd have kids someday. Because That's What People Do. And then one day I thought to myself, "You know, I love kids, and I hope I'll always have some in my life as students or mentees or nieces or nephews, but I don't actually want any of my own." It'd be hard if I ended up falling for somebody who wants them, but I still don't think I'd do it. Kids deserve to have both parents want them.