I work from home. One side-effect of this is that my office is periodically invaded by barbarian-like hordes of rampaging preschoolers and toddlers. While repelling one such invasion today, I noticed that Calista, my one-year-old daughter, was missing her shirt. Also her shoes and pants. And her diaper. Since it's a father's job to pay attention to these things, I investigated. Turns out that Calista has decided to potty train herself today. So far she's refused all clothing and, entirely on her own initiative, has been using the toilet all day. She is very pleased with herself.