"Androphilia" and "gynephilia" (or "gynecophilia") are terms in behavioral science (the study of human and animal behavior) that describe sexual orientation. It is an alternative to the gender binary in homosexual and heterosexual. The terms describe the focus of attraction with no need to credit a sex assignment or gender identity to the person. Other terms such as "pansexual" and "polysexual" also do not make any connection to the person. People may also use terms such as "queer", "pansensual," "polyfidelitous," or "ambisexual".