Definition & Meaning of "pillow-biter"in English

What is the origin of the term "pillow-biter" and how is it used?

Pillow-biter is a slang term that appeared in mid-20th-century English to describe someone—usually a gay man—who engages in anal sex as the receptive partner, often implying passivity. The term comes from the imagery of biting a pillow during sexual activity, emphasizing the act rather than the person's identity. Historically, it was derogatory and mocking, used to shame or belittle men for sexual behavior. Today it remains highly offensive and vulgar, and its use is generally limited to crude, sexualized, or informal contexts rather than polite or neutral conversation.