'Think Like A Man' has proven itself to be a Box Office hit raking in $33Million in its opening week. The movie is based on Steve Harvey's book "Act Like A Lady, Think Like A Man". In the movie they touch on the infamous 90 Day Rule. This rule has been around long before Steve Harvey's book. The 90 Day Rule basically says that a woman should make a man wait 90 days before having sex. Does this w…