What a responsible question you ask. You didn’t say whether you are a man or woman. So, I will answer the question for both sexes and you can take what applies to you.If you are a woman who has an STD and wishes to receive oral sex, the method that is recommended is a latex rubber dam. These are sold in dental supply houses or you can make your own by cutting open a condom and placing the rubber square over your genitals. By using this technique your partner should not be in direct contact with your genitals or body fluids.If you are a man and want to receive oral sex, then you must wear a condom while your partner stimulates you orally.I would also talk with the doctor that diagnosed your STD, to see if he or she has any additional suggestions for you. Good luck to you. I hope that these techniques help you to experience a more full array of sexual stimulation.