The idea that sexual desire, attraction and/or identity are not necessarily static but can change over time and in different relationship situations. For instance, a woman can be sexually and romantically attracted to women at one point in her life and then at another time have those feelings for men or people of similar or different genders. Sexual fluidity can be marked by a specific identity that a woman may experience as changing (i.e., from lesbian to bisexual or heterosexual) or she may identify outside the conventional “categories” of sexuality. Not all people experience their sexuality as fluid (i.e. a bisexual woman may identify as bisexual for her whole life).