Heterosexuality:Homosexuality :: Bisexuality:?

Heterosexuality and homosexuality are two different sexual orientations, where heterosexuality means being attracted to the opposite sex and homosexuality means being attracted to the same sex. Similarly, bisexuality refers to being attracted to both males and females. So, if we think of the relationship between heterosexuality and homosexuality, we can see that bisexuality is a middle ground that includes both. For example, a person who identifies as bisexual might feel romantic feelings for someone of any gender, which shows that their attraction is not limited to just one type. Therefore, the answer to the analogy would be "pansexuality," which also encompasses attraction to all genders, just like bisexuality does to both.