How does the brain's chemistry change with pornography viewing?

This is a great video about how brain chemistry works.

http://www.youtube.com/watch?v=0ADYe5w75yk&feature=youtu.be

How can we get help with accountability? What if it is damaging my marriage?
http://www.covenanteyes.com/2008/06/27/a-marriage-restored-part-1/

Great video testimony that tells the story of a marriage restored...
http://www.youtube.com/watch?v=WcpotyZ_oSM