Last week, my daughter had her first drop-off playdate. I used to dreamed of the day when I'd be able to run to the grocery store while someone else's mom watched the kids. But walking away from that playdate was a bit of a wake-up call. She's growing up.
People accept an 8-year-old who still acts 6. They are just "young for their age." They will tolerate a 10-year-old who still acts 6 if the parent looks exhausted enough. But a 13-year-old who is still acting like a 6-year-old is a serious social problem. I know, because this child is my son.