Gay men, risk reduction and serostatus". What is not immediately clear is whether one conception is most suited to all social, legal, and constitutional purposes.
Many cultures use identity labels to describe people who express these attractions. The Social Organization of Sexuality. Journal of Cross-Cultural Research.
Some studies only consider a person bisexual if they are nearly equally attracted to both sexes, and others consider a person bisexual if they are at all attracted to the same sex for otherwise mostly heterosexual persons or to the opposite sex for otherwise mostly homosexual persons. Gay, Straight, and the reason why. Predominantly heterosexual but more than incidentally homosexual.