… In short, men are especially vulnerable to porn images because these images can hijack a male brain’s command center in a way they generally cannot a female’s. The hypothalamus is also the center that determines hunger and satiation—in both sexes. So, an arousal response to Internet porn is as natural to a man as a growling stomach is to the smell of food on a grill. …
via Is porn a bigger problem for men than women? | Your Brain On Porn.