We’re a planet of pervs and it isn’t our fault:

The Neuroscience Behind Sexual Desire
freakonomics.com

In what is claimed to be the largest experiment ever, two neuroscience PhDs from Boston University, Ogi Ogas and Sai Gaddam, analyzed a billion web searches, a million web sites, a million erotic videos, millions of personal ads, thousands of digital romance novels, and combined it all with cutting-edge neuroscience. The result is the most complete study of the human brain and sexuality ever, which they’ve compiled into a new book called A Billion Wicked Thoughts: What the World’s Largest Experiment Reveals About Human Desire. Among other things, their research reveals profound differences between the sexual brains of men and women, even though they are both hardwired to respond to the same sexual cues. For instance: male brains form sexual interests during adolescence and rarely change, while female brains change frequently throughout their lives. For men, physical and psychological arousal are united, while they’re completely separate for women.