To define persons in terms of sexual behavior is difficult, if not impossible. Some theorists since Kinsey have acknowledged most people are exclusively heterosexual or homosexual, but nonetheless, most people do have a preference which helps to define who one is. A few anthropologists have studied cultures which permit an enormous diversity of consensual expression without censure or condemnation. In these cultures, labels denoting sexual orientation do not seem to exist. Indeed, some cultures have even institutional bisexual behavior as the norm.
Older bachelors train young novices to the ways of the male group.
Following puberty ceremonies, males are expected to marry women and encouraged to end homosexual activity. One needs to keep in mind bisexual people are no more homogeneous a group than are gay men or lesbians. There is not uniformity in either overt behavior or in psychological experiences. For others, bisexuality represents a genuinely equal attraction to both sexes or attraction to both with a preference for one over the other. As you can see, the boundary lines are very fuzzy.