there are low risks of acquiring stds through oral sex yes. the main ones i worry about are hepatitis b and a. . herpes less likely. but it wouldn't be a bad idea to get partners tested if possible. the dental dam is like a big piece of thicker plastic wrap but regular plastic wrap is also a decent barrier in a pinch. i know it all sounds pretty odd but it is safer.
what are the risks of a man getting stds by giving a woman oral sex?