The peacock's tail, the grotesquely enlarged claw of the male fiddler crab and the machismo of members of the human species are all exaggerated features that may cause injury to individuals that display them but attract females.
In American literature, a memorable example of machismo comes from Tennessee Williams' character Stanley Kowalski, the egotistical brother-in-law in A Streetcar Named Desire. In the play (and in the motion picture), Stanley epitomises the hyper-masculine alpha male, socially and physically dominating and imposing his will upon his wife and her sister, Blanche Dubois. Bound up with Stanley's aggressive and occasionally misogynist views is a strong sense of pride and honor which leads to his hatred of Blanche.
In the play "A View from the Bridge" by Arthur Miller, one of the main characters Eddie is a classic type who displays machismo. He wants to be the best out of the men who he is among and when beaten, becomes very quiet.