In-depth interviews with women having a history of bisexual behavior and/or a bisexual self-identification revealed only moderate correspondence between behavior and identity. A general description is provided of the sexual relationships of the respondents. The major focus is on the wide diversity of self-identified bisexual women, especially in terms of self-perceived sexual and emotional needs, circumstances precipitating heterosexual and homosexual behavior, and ideological supports for a bisexual life style. Heterosexual behavior among homosexual women is discussed in terms of economic necessity, experimentation, and the response of the lesbian community. Homosexual behavior among heterosexual women is discussed in terms of responses to different kinds of situational exigencies and the rationalizations used to deal with the experience while insulating the heterosexual self-identification.