Using condoms protects against STIs. They even come in flavours to increase the fun.
If you don’t use a condoms for blow jobs….
A: No. Spitting, swallowing or not letting the guy cum in your mouth will not make a difference in the transmission of an infection.
A: Hep C is not generally considered sexually transmitted. Hep C is transmitted blood to blood. This means your blood needs to come in contact with someone else’s blood.