My oldest is now 10. Last year, or maybe it was two years ago, he went to a sleepover birthday party, as kids do. At the time, I didn't think anything of the fact that it was a co-ed invite list. I think my oldest son may have been the only boy invited, I'm not sure because I didn't care enough to examine who was there when I dropped off or picked up. After the party ended, I forgot it had even happened. A few months ago, I was at another party where the topic of "that party with the boy sleeping over" came up. The parents I talked to were sagely nodding to each other, relieved that one girl just went for the movie and didn’t sleep over. According to the group wisdom, her parents had done well. "Uh, yeah." I said, "That one boy there was my son."