I was bending down, changing Maya's nappy as she stood beside our parked car on the footpath (as you do), when an elderly lady with a walking stick stopped to say hello. She commented that she was too old to bend over like that, and it's just as well you have kids when you're young. As she walked off, Alex asked me why she needed a walking stick. I explained that sometimes when you get old, you need things to help you walk.
Alex considered this. "Mum, are you old?" he asked me. "Hmmm, no, not really," I replied.
"So," he concluded, "you must be new!"