Here's something for those who are into this. The message is,
use a condom all the time. But if you don't want to use it for some
incomprehensible reason, then oral sex is safer:
"There are a few known cases of people getting HIV from giving oral
sex (licking or sucking). There are no known cases of someone
getting HIV from receiving oral sex (being licked or sucked).
Experts believe that oral sex without protection is less risky than
other kinds of sex, but all agree that it is possible to get HIV
from giving oral sex to an HIV-infected partner without protection,
especially if the HIV-infected partner ejaculates in the mouth.
Certain factors, such as the presence of any cuts or sores in the
mouth, are thought to increase the riskiness of oral sex.
Giving oral sex (blow job) to a man has been proven to carry some
risk of getting HIV, although most scientists believe the risk is
relatively low. The risk increases if the person giving the blow
job has any cuts or scrapes in his or her mouth, even small ones
that can be caused by brushing or flossing right before sex. To
have safer oral sex, avoid getting any semen in your mouth, either
by pulling away before ejaculation, or by using a nonspermicidal
condom. You can use an oral barrier such as a dental dam or plastic
wrap to make oral-anal sex (rimming) safer.
Giving oral sex to (going down on) a woman is also relatively low
risk. The possibility of infection is higher if there is menstrual
blood or if the woman has another STD. You can use an oral barrier
such as a dental dam or plastic wrap to make oral-vaginal sex
(cunnilingus) or oral-anal sex (rimming) safer.
(http://hivinsite.ucsf.edu/hiv?page=basics-00-0
