Homophobia encompasses a range of negative attitudes and feelings toward homosexuality or people who identify or are perceived as being lesbian, gay or bisexual. It has been defined as contempt, prejudice, aversion, hatred, or antipathy, may be based on irrational fear and may sometimes be attributed to religious beliefs. Homophobia is observable in critical and hostile behavior such as discrimination and violence on the basis of sexual orientations that are non-heterosexual.

Boys Beware, a 1961 US social guidance film warning boys to beware the “predatory” dangers of homosexual men. The film pushes the common homophobic tropes that homosexuality is a mental illness, and that gay men are pedophiles.