Sucking
It is clear that the risk of transmitting HIV is much, MUCH lower for unprotected
oral sex than for unprotected anal or vaginal sex, and that the risk is MUCH
lower for the person being sucked or licked than for the person doing the sucking
or licking. For the person doing the sucking or licking, the risk of transmission
is lower if your gums (and lips/mouth/throat) are healthy, if you don't let
men come in your mouth, and if you don't perform cunnilingus on a woman while
she is menstruating.
Some people recommend NOT flossing or brushing your teeth for an hour before
giving unprotected oral sex (use Cool Mint Listerine or some other anti-bacterial
mouthwash if you're concerned about bad breath or just want to freshen up),
and others recommend quickly looking over the genitals you're about to go down
on for obvious signs of contagious sexually transmitted infections (including
genital warts, which can on rare occasion be transmitted from genitals to mouth).
If your policy for performing unprotected cock-sucking is to not let your partner
come in your mouth and he does so anyway, it's better to immediately spit than
to either wait or swallow, and it may help (especially for bacterial infections)
to then go use an anti-bacterial or peroxide mouthwash. Pre-cum can contain
HIV, and although not letting men come in your mouth SIGNIFICANTLY reduces your
already low risk to even lower levels, if you are concerned about becoming infected
via pre-cum while performing fellatio you have two risk-reduction options: not
taking the head of his penis in your mouth or using barriers for oral sex.
If after getting all the facts you decide that your personal safety standards
include barriers for oral sex, then you'll need to use latex condoms (without
Nonoxynol-9) for cock-sucking, and either regular saran wrap or one of those
"Glyde" dams for eating vag (for this, put a little water-based lube
on your partner's side of the barrier to increase the sensation transmitted
to her). The same barrier techniques used for cunnilingus can also be used for
rimming (licking someone's asshole), where they should be considered essential
if the person doing the licking isn't immunized against hepatitis A or if the
person being licked may have a bacterial infection.
