Bisexuality is romantic attraction, sexual attraction or sexual behavior towards more than one gender. It is different from feeling attraction to all genders, which is known as pansexuality or omnisexuality.
Along with heterosexuality and homosexuality. bisexuality is one of the three main categories of sexual orientation within the heterosexual–homosexual continuum. However, some authorities feel that limiting sexual classification to a linear representation does not reflect the width or depth of sexual attraction and behaviour.