The porn video tag "gays-sucking" refers to a scene or content where two or more male individuals engage in oral sex acts, specifically involving the act of fellatio. In this context, "gays" signifies the preference for same-sex relationships, and "sucking" is a slang term for fellatio, which involves one person stimulating another's genitals (usually the penis) through oral contact. This tag is used by adult audiences to categorize content related to male on male oral sex, which is commonly seen in gay pornography.