Jessica Grose follows the abstinence arc of former sex blogger Lena Chen:

People just a micro-generation younger than Chen are wise to the downside of overexposure and already seem less inclined to reveal themselves. According to a recent Pew study on Internet habits, only 14 percent of teens now blog, down from 28 percent in 2006. Even on social networking sites like Facebook, millennials are becoming protective of their privacy: Most have put privacy boundaries on their online profiles, and a New York Times article from last month discussed the lengths to which striving high schoolers go to keep their Facebook activity hidden from college admissions officers. Just this past weekend in an article called "The Tell-All Generation Learns to Keep Things Off-Line," the Times discussed the myriad ways in which teens are keeping their online profiles squeaky clean.

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