Pornography and masturbation can lead to neuroplastic changes where males become aroused by watching others have sex rather than being active participants, potentially decreasing motivation for real-world sexual partners.

“So in that sense, that's more about the brain wiring, and neuroplasticity, and dopamine. But what are your thoughts on porn and masturbation as they relate to hormones? I mean, this is a big debate on the internet. In fact, one of the most common debates is whether or not masturbation increases or decreases testosterone in males. Certainly, it will decrease motivation to go find sexual partners. We know this.”