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Men who report watching a lot of pornography tend to have less volume and activity in regions of the brain linked to rewards and motivation, says a new German study.
The study, published in JAMA Psychiatry, can’t say watching porn caused the decrease in brain matter and activity, however.
It’s not clear, for example, whether watching porn leads to brain changes or whether people born with certain brain types watch more porn, said Simone Kühn, the study’s lead author from the Max Planck Institute for Human Development in Berlin, in an email.
“Unfortunately we cannot answer this question based on the results of the present study,” Kühn said.