Masculinity cannot be regarded as a single entity. Both within Western culture and across cultures, a wide variety of masculinities are easily observable. Yet masculinity is so often contrasted with femininity that the many differences among men are at times obscured. To in part correct this deficiency, various “psychologies” of men are explored, as well as the cultural components that shape a society's ideas of what constitutes masculinity. Male heterosexuality and homosexuality are also examined, as are a number of the fantasies and fears that men typically experience. What cannot be left out of any exploration of male psychology are those sources of strength that permit so many men to fiercely protect their families and, when called upon, to fight their country's wars. Nonetheless, the differences between individual men are significant and can even be said to be vast.