In male gay culture, a bear is often a larger, hairier man who projects an image of rugged masculinity. Bears are one of many LGBT communities with events, codes, and a culture-specific identity. However, in San Francisco in the 70s any hairy man of whatever shape was referred to as a 'bear' until the term was appropriated by larger men and other words had to be found to describe hairy other-shaped men such as otter (slim) or wolf (medium-build).
The term bear was popularized by Richard Bulger, who, along with his then partner Chris Nelson (1960–2006) founded Bear Magazine in 1987. There is some contention surrounding whether Bulger originated the term and the subculture's conventions. George Mazzei wrote an article for The Advocate in 1979 called "Who's Who in the Zoo?", that characterized homosexuals as seven types of animals, including bears.
There is no universally agreed-upon definition of who can or cannot identify as a bear. The bear concept can function as an identity or an affiliation, and there is ongoing debate in bear communities about what constitutes a bear. Some bears place importance on presenting a clear masculine image and may disdain or shun men who exhibit effeminacy, while others consider acceptance and inclusiveness of all behavioural types to be an important value of the community.
Bears are almost always gay or bisexual men. However, as LGBT culture and modern slang has taken on a wider appeal in modern society, it is possible to call a hairy and burly straight man a bear (although they would not be strictly part of the gay bear community). Increasingly, transgender men (trans men) and those who shun labels for gender and sexuality are also included within bear communities. However, heterosexual men who have bearish physical traits and are affirming of their gay friends and family (or their gay fans, in the case of a celebrity) may also be informally accorded "honorary" bear status. A smaller number of lesbians, particularly those portrayed as butch, also participate in bear culture, referring to themselves with the distinct label of ursula.