Effects of porn addiction The fact that it’s so easy to access, porn becomes a dependent erotic material. Research suggests that pornography use can lead to changes in your brain. In a study reviewing porn’s addictive nature, subjects that consume high amounts of porn were found to have increased brain reactions when introduced with pornographic signals. Like other addictions watching porn affects your brain’s reward system, affecting the neurotransmitter called dopamine that plays a big part in pleasure and cravings.