Bisexuality challenges familiar assumptions about love, family, and sexual desire that are shared by both heterosexual and homosexual communities. In particular, it challenges the assumption that a person's desire can and should run in only one direction. Furthermore, bisexuality questions the legitimacy, rigidity, and presumed ontological priority of the categories "heterosexual" and "homosexual." Bisexuals are often assumed to be dishonest and unreliable. I suggest that dishonesty and unreliability can be resources for undermining normative sexualities.