This video also explains why watching Internet p 0 r n creates erectile dysfunction problems.
There should be only ONE source for your sexual arousal, and that is your partner. Any other sources such as self-gratification & p 0 r n have negative affects our primary source of desire: the Brain.
All erections begin in the brain, and if the brain is confused by p 0 r n & self-gratification the pathways to the penis and your partner suffer.