Can i give my girlfriend genital herpes if i get cold sores and give her oral sex, but don't have a cold sore at the time? and if i give her cold sores, and she gives me oral sex, can i get genital herpes?

Cold : Cold sores or fever blisters are caused by herpes simplex virus type 1 (hsv-1) and are extremely common. Most people become infected as an infant or small child when kissed or by sharing eating utensils with an adult who has the virus. The virus is most contagious when someone has a cold sore, but can still be passed along by someone who does not. Many people do not even know that they are infected because the virus can "hide out" in the nerve cells for very long periods of time - for some people it hides out forever and they never get a cold sore. For others, the virus can "wake up" and that's when a cold sore happens. No one knows exactly what causes a cold sore to appear - sometimes stress, illness, fevers, colds, sunlight, cold weather, menstruation, certain foods, allergies, you name it! they usually last 7-10 days and are more of an annoyance than a danger unless you have a weakened immune system or contract a bacterial infection on top of the cold sore. Genital herpes is typically caused by herpes simplex type 2 (hsv-2) and can only be spread via sexual contact with an infected person. The bad news is that you can get an hsv -1 infection in the genital area from oral sex. The good news is that 80% of the population have been exposed to it and have antibodies to hsv-1 that will help protect them. Your girlfriend has already been exposed (by kissing you) and you already have hsv-1, so both of you likely have antibodies and so have a low likelihood of causing genital infections with hsv-1.

Sex: Herpes can be transmitted to your sexual partner during oral or vaginal sex. It is contagious when you have open sores.