I HAVE reached a curious point in life. Although I feel like the same precocious know-it-all cynic I always was, I suddenly am surrounded by younger precocious know-it-all cynics whose main purpose appears to be to remind me that I’ve lost my edge.

So last week I joined Facebook, the social network for students that opened its doors last fall to anyone with an e-mail address. The decision not only doubled its active membership to 24 million (more than 50 percent of whom are not students), but it also made it possible for parents like me to peek at our children in their online lair.

After I got my Profile page, the first thing I did was to search for other members — my daughter and her friends — to ask them to be my friends.

Shockingly, quite a few of them — the friends, not the daughter — accepted my invitation and gave me access to their Profiles, including their interests, hobbies, school affiliations and in some cases, physical whereabouts.