Sex makes the male world go 'round
Depending on whom you talk to, it is common knowledge that men think about sex anywhere from every five seconds to every 60 seconds. This common knowledge is false.
The closest scientific study done on this is by Alfred Kinsey, the first major pioneer in the research of human sexuality. About 54 percent of men think about sex every day or several times a day, according to Kinsey's Sexual Behavior in the Human Male.
It's true that men think about sex every day, so it should be no surprise that men are also motivated by sex in just about all aspects of life.