"How Porn Hijacks the Brain
Multiple problems happen when porn is used. First, instead of forming a deep connection to a person, your brain ends up “bonding” to a pornographic experience. Your brain remembers where the sexual high was experienced, and each time you desire sexual stimulation, you feel a sharp sense of focus: I’ve got to go back to the porn.
In addition, pornography gives the brain an unnatural high. In a recent TEDx talk, physiology teacher Gary Wilson explained that when men look at porn, they experience surge after surge of dopamine in the brain. The brain eventually fatigues, stopping the production of dopamine, leaving the viewer wanting more but unable to reach a level of satisfaction. As a result, everyday pleasures stop causing excitement and the viewer seeks out more novel, more intense pornography to get the same high as before.
This imbalance in the brain leads to many problems: impotence with your spouse, frequent masturbation with very little satisfaction, anxiety, fatigue, lack of motivation, inability to concentrate, and escalating tastes for more bizarre or novel porn."