Homosexualities: A Study of Diversity Among Men and Women (1978) is a book by the psychologist Alan P. Bell and the sociologist Martin S. Weinberg in which the authors argue that homosexuality is not necessarily related to pathology and divide homosexuals into five types. Together with Homosexuality: An Annotated Bibliography (1972), it is part of a series of books that culminated in the publication of Sexual Preference in 1981. The work was a publication of the Institute for Sex Research. The book received much attention and mixed reviews. It received praise for its authors' attempts to discredit stereotypes about homosexuals, became influential, and has been seen as a classic work. However, it was criticized for its authors' sampling methods and their typology of homosexuals, which has been seen as arbitrary and misleading. Commentators also questioned Bell and Weinberg's presentation of the work as a definitive study of homosexuality. Some commentators suggested that some of Bell and Weinberg's findings were obvious and that their study was not needed to establish them, and critics charged that they drew conclusions not justified by their data. Some of Bell and Weinberg's findings, such as those about gay men's sexual behavior, have become dated due to social changes since the 1970s, such as those brought about by the AIDS epidemic and the progress of the gay rights movement. Source: Wikipedia (en)