Sources

http://www.thirdage.com/love-romance/the-male-vs-the-female-brain

http://articles.cnn.com/2010-03-23/opinion/brizendine.male.brain_1_male-brain-mate-early-feminists?_s=PM:OPINION

http://www.google.com/search?hl=en&defl=en&q=define:pheromone&sa=X&ei=wYYwTdnJEcP_lgeYtYWtCg&sqi=2&ved=0CBgQkAE

http://www.5min.com/

http://alcoholism.about.com/cs/women/a/aa010604a.htm

http://www.wrongplanet.net/postt140995.html