Common Causes and Treatment. But the duration of each phase differs widely from person to person. Researchers at Emory University found that viewing sexually arousing images increased activity in the amygdalae of men more than it Men want more sex than women for women. Learn how "low T" can affect younger men and what symptoms it can cause. Sex drive and the brain. However, there are many parts of the brain involved with sexual response, so this finding does not necessarily mean that men are more easily aroused than women. This includes thinking about sex.