Researchers found less grey matter in the brains of men who watched large amounts of sexually explicit material, according to a new study from the Max Planck Institute in Berlin.
The institute recruited 64 male subjects aged 21-45, "with a broad range of pornography consumption." The men were not told initially that the research was monitoring their brains on porn, rather that it was "a scientific study including magnetic resonance imaging (MRI) measurements."
The men were told during a later phone interview that questions about pornography would be part of the research, and none dropped out.
