I wish I had something great to post, but this is day 7 of a pretty bad migraine, so I can barely read.
But - At preschool yesterday, kids got to talking about twins. Ds said, "I'm getting a twin soon!" so they talked about what it means to be/have a twin. One child offered "Twins look alike." Ds's teacher asked if he and I. looked alike. "Of course not," he said. "She's a girl."