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The iPhone was released in 2007. By 2018—a decade later—95 percent of teens had access to a smartphone and 45 percent reported being online “almost constantly.”13 Tumblr, Instagram, TikTok, and YouTube—all very popular with teens—host a wide array of visual tutorials and pictorial inspiration to self-harm: anorexia (“thinspiration” or “thinspo”), cutting, and suicide. Posting one’s experiences with any of these afflictions offers the chance to win hundreds—even thousands—of followers.14 Anorexia, cutting, and suicide have all spiked dramatically since the arrival of the smartphone.15
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Abigail Shrier (Irreversible Damage: The Transgender Craze Seducing Our Daughters)