a person who has sexual relations with both sexies but are not monogamous with either sex. May be someone who participates in orgies and open relationships. Or may be a ninfo.
a person who does not have a sexual gender preference, a person who is monogamous with male or female partners when in a relationship, a person who usually does not participate in orgies.
My girlfriend is bisexual and not bi-curious, we are together monogamously.