But precum contains HIV, too. Be aware of the state of your mouth. Bleeding gums or cuts can increase the risk of infection. Don't brush your teeth prior to oral sex, or if you do be gentle as to not scratch your gums with the brush. But you can get hepatitis, gonorrhea or other sexually transmitted diseases.
Condoms are reliable, if treated right.
Condoms are reliable, if treated right. They contain oils, and oils weaken condoms. Watch out for fingernails when opening the condom package and unrolling the condom. Fingernails or teeth can weaken the condom. Keep condoms cool and dry, in a book, bag or dresser drawer.