I saw some friends last night at church who mentioned that they had seen the boys at their babysitter's on Friday (without me, of course).
Mitzi: "... and how surprised we were when Two came crawling through the dog door to say hello!"
When I got home I told the boys Mitzi and Jerry had said hello, and related the story of the dog door.
Two: "yup. I can fit through it but One can't!"