Addiction in general
I've been hearing and reading a lot lately about how addiction is related to the pleasure centers in your brain. Some have gone as far as to say that addiction to pornography can be as powerful as addiction to heroin because of the synaptic pathways that are formed in your brain are just as strong for either.
My struggle is gone now that I have broken the pattern and realized how betrayed my girlfriend felt when I did slip and look at porn.

