Many people are gay or lesbian, and are drawn sexually and emotionally only to partners of the same sex. Others are heterosexual, bonding in sexual and intimate relationships only with people of the opposite sex. However, a significant percentage of people do not fit into either of these categories, because they experience sexual and emotional attractions and feelings for people of different genders at some point during their lives. They are called bisexuals, or also known as "pansexual," "non-preferential," "sexually fluid," "ambisexual," or "omni-sexual."
The Kinsey scale of 0-6 was developed by sex researchers to describe sexual orientation as a number. Heterosexual people are at zero on the scale, gay and Lesbian people are at six at the other end of the scale, and everyone in between, from one to five, is bisexual. People who fall at one or two on the scale have primarily heterosexual relationships and desires, but have some attraction and experiences with same-sex partners as well. People at three on the scale are approximately equally attracted to both men and women. People at four and five on the Kinsey scale choose primarily same-sex partners, but are not completely gay or lesbian and have some heterosexual tenies and relationships as well.
WHO IS BISEXUAL?
As you can see, there is no simple definition of bisexuality, and bisexual people are a very diverse group. J. R. Little identifies at least 13 types of bisexuality, as defined by sexual desires and experiences. They are:
Alternating bisexuals: may have a relationship with a man, and then after that relationship ends, may choose a female partner for a subsequent relationship, and many go back to a male partner next.
Circumstantial bisexuals: primarily heterosexual, but will choose same sex partners only in situations where they have no access to other-sex partners, such as when in jail, in the military, or in a gender-segregated school.
Concurrent relationship bisexuals: have primary relationship with one gender only but have other casual or secondary relationships with people of another gender at the same time.
Conditional bisexuals: either straight or gay/lesbian, but will switch to a relationship with another gender for financial or career gain or for a specific purpose, such as young straight males who become gay prostitutes or lesbians who get married to men in order to gain acceptance from family members or to have children.
Emotional bisexuals: have intimate emotional relationships with both men and women, but only have sexual relationships with one gender.
Integrated bisexuals: have more than one primary relationship at the same time, one with a man and one with a woman.
Exploratory bisexuals: either straight or gay/lesbian, but have sex with another gender just to satisfy curiosity or "see what it's like."
Hedonistic bisexuals: primarily straight or gay/lesbian but will sometimes have sex with another gender primarily for fun or purely sexual satisfaction.
Recreational bisexuals: primarily heterosexual but engage in gay or lesbian sex only when under the influence of drugs and/or alcohol.
Isolated bisexuals: 100% straight or gay/lesbian now but has had at one or more sexual experience with another gender in the past.
Latent bisexuals: completely straight or gay lesbian in behavior but have strong desire for sex with another gender, but have never acted on it.
Motivational bisexuals: straight women who have sex with other women only because a male partner insists on it to titillate him.
Transitional bisexuals: temporarily identify as bisexual while in the process of moving from being straight to being gay or lesbian, or going from being gay or lesbian to being heterosexual.
Source
Master Steelow