Relationships can be difficult. This guide presents the scientific reasons why men and women are different, covering topics such as why men shouldn't lie to women and why men are quiet and women like to talk. Presenta las razones cient�ficas porque los hombres y mujeres son diferentes, explica temas, tal como porqu� los hombres no deben mentir a una mujer y porque hablan poco mientras las mujeres hablan tanto.