coitus in os

Definition

Or: coitus per os , Latin for mouth coitus, mouth contact with the male genitals, fellatio. CAUTION: Oral sex between disease-free partners is not risky and although oral sex was, until resently, considered a low risk activity for getting HIV (USA Today (Feb. 2, 2000) a recent study shows that as many as 8% of new HIV infections in gay men result from performing oral sex) other STDs such as syphilis, gonorrhea, herpes 2 that can be transmitted orally. Since HIV may be contained in the seminal and vaginal fluids of an HIV-infected person, protection in the form of a latex condom with spermicide (preferably nonoxynol-9) is recommended for fellatio. It isn't easy for HIV to get into the bloodstream through the mouth unless that mouth contains cuts, sores, or recent dental work. No cases have yet been reported of people being infected with HIV by having oral sex performed on them.
Synonyms: corvus (obs.); fellatio; fellation; fellatorism; oral copulation of the penis; penilinctus; penilingism; penilingus; penosugia; phallalingus; virilingus. See fellatio for synonyms.