(I've been reading
The Social Costs of Pornography: A Statement of Findings and Recommendations.)
"The men at their computers [addicted to] looking at porn [are] uncannily like the rats in the cages of the NIH, pressing the bar to get a shot of dopamine or its equivalent. Though they [don’t] know it, they [have] been seduced into pornographic training sessions that [meet] all the conditions required for plastic change of brain maps."
- By Layden, Mary Anne ; Eberstadt, Mary; Kindle Locations 275-278. The Witherspoon Institute.