Usually, if someone gets HIV through sucking it's because of the condition of their mouth or throat. Gum disease, recent dental work, sores in the mouth, or a sexually transmitted disease, such as herpes in the mouth or gonorrhea in the throat, can increase the risk for HIV through oral sex. There are many things you can do to make sucking safer. Get regular check-ups for sexually transmitted diseases with a doctor, or at a clinic, where you are comfortable being open about the kind of sex you have with guys. If you give guys blow jobs, your check-up should include a swab of your throat.
Some guys use a latex condom when they give a guy a blow job.
Latex condoms can protect you from HIV and other sexually transmitted diseases. Use a dry, unlubricated condom or a flavoured condom, both of which will taste better than regular lubricated condoms. If you get sucked with a condom, it can take longer to cum. It's a common, initial reaction. Avoid cum in your mouth.