Masculinity varies from time to time and place to place. But it doesn't exist just in the mind of a single guy: it is shared withthe other guys. It is a code of conduct that requires men to maintain masculine postures and attitudes (however they are defined) at all times and in all places. Masculinity includes the symbols, uniforms, chants, and plays that make this the boys' team rather than the girls' team.

Man Enough: Fathers, Sons, and the Search for Masculinity (ed. Penguin, 1994) - ISBN: 9780399518836