The definition of beauty

Human ,sometime, determine what beauty is based on their conception. That's somehow ironic. For example, men always mate with female who is pretty. What is their definition of the word "pretty"? Most males dislike "heavy" girlfriends; but,to other that's how beautiful the women is. For instance, a Chinese king fell deeply in love with his queen on account of her weight. People judge what is beauty and what is not. 

According to Plato, human emotion can deceive their objective truth. Now in the modern time, women define what beauty really is.