Researchers have found a naturally occurring protein that gets rats addicted with no drugs at all.
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Read More… from (L) BDNF – Flipping The Brain’s Addiction Switch Without Drugs (2009)
Comments: This is for the general public, but it can be a bit technical. Nevertheless, it is one of the best and most complete articles written on addiction. 
By Eric J. Nestler and Robert C. Malenka
February 09, 2004
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Read More… from (L) The Addicted Brain – Nestler and Malenka (2004)
Comments: This is for the general public, but it can be a bit technical. Nevertheless, it is one of the best and most complete articles written on addiction.
By Eric J. Nestler and Robert C. Malenka
February 09, 2004
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Read More… from (L) The Addicted Brain: Nestler and Malenka (2004)
Dopamine inhibits some stop circuits as it strengthen go circuits – 2008
Unlocking mystery of why dopamine freezes Parkinson’s patients
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Read More… from Dopamine Reshapes Key Brain Circuits that Control Behavior (2008)
COMMENTS: Delta-FosB is a brain chemical important in the formation of addictions. It builds up in “natural addictions” such as aerobic exercise and sexual activity (and no doubt, porn addiction). Some sources suggest that it declines around the 6-8th week of abstinence. We suspect this decline in Delta FosB is behind the big improvements people see once they get to the 8 week mark.
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Read More… from (L) Brain Buildup of Delta-FosB Causes Addiction
ScienceDaily (June 25, 2010) — Why is it that only some drug users become addicts? 
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Read More… from Addiction – A Loss of Plasticity of the Brain? (2010)
Not sure how to masturbate without porn? Ask anyone over 40! Remember: your ancestors didn’t have the internet. Therefore they didn’t fall into the trap of conditioning their sexual template to everything associated with their porn use, such voyeurism, multiple tabs, HD streaming hardcore, searching/seeking, endless novelty. It can also include porn-induced fetishes, strange acts, […]
It can be. “Sin” is a surprisingly powerful aphrodisiac. The rational mind thinks that risk (a threat of punishment, for example) makes an activity less appealing, but the mammalian brain can actually register risk as more appealing. Risky things (like sky diving, for example) raise dopamine. This means fears of roasting in hell can too.
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Read More… from Is porn a bigger challenge for religious people?
One man suggested:
During the day video flashbacks of porn movies you have viewed in the past might come to your mind, trying to get you to view porn and masturbate. Try this technique if you want to blow them to smithereens and to start associating them with the pain and negative feelings you feel after masturbation.
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“Remember the first step is hard, but the second is actually the hardest.”
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Read More… from What if I masturbate (edge) or watch porn without orgasm?