More than two decades of growing internet use has surfaced fears about the social and psychological impacts of nearly unfettered access to pornography. But many researchers and sex therapists worry that the online communities that have formed in response to these fears often endorse inaccurate medical information, exacerbate mental health problems and, in some cases, overlap with extremist and hate groups.

NPR's Lisa Hagen speaks about her reporting with NPR's Ayesha Rascoe.

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