quote "paulh50" :
I've never heard of rubbers for a man's tounge but if you're worried about STDs from Cunnilingus the easiest way for a man to protect himself is to simply take a piece of Saran Wrap or Glad Wrap or any type of thin plastic material and use it. You can still smell and feel the sensation of your tongue on the woman's clit and entering her pussy but there's no tasted or stransferance of fluids.
When ever I am with a woman that I intend to preform Cunnilingus on I do a through visual inspection and, as some one else mentioned, smell her.
I pratice safe sex and expect the woman I am with to practice safe sex but if it comes down to a OWO of unprotected Cunnilingus I want us both to check out each other first. The most common STD transfered from unprotected Cunnilingus is Herpes.
I've heard people say that dental dams work well too. I've looked on the net and have found results that indicate the transmission of HIV/AIDS is relatively minute with oral sex whether performed on a female or male. The most commonly transmitted diseases are as you said herpes and chlymidia(sp?) If you maintain a regular clientelle as I do you can be reasonably sure those are safe it's the new clients I take precautions with I'm not particularly fond of the taste of condoms even the flavored ones but with strangers I always use them. I discreetely slip one in my mouth as he's getting undressed and most of them never even know I put one on them.