National Geographic Magazine has published an eye-opening map that shows where single adults are living. Males (Blue dots) tend to live in the Western urban areas while females (Yellow dots) tend to live in many eastern cities. Why? About 58% of college students are women, many of whom join the white-collar workforce after graduation. Males, on the other hand, tend to gravitate toward areas where agriculture and construction are prominent, partly because many of them are illegal immigrants. Once again, the Mississippi River serves as another line of demarcation!