Oral sex , sometimes referred to as oral intercourse , is sexual activity involving the stimulation of the genitalia of a person by another person using the mouth including the lips, tongue, or teeth and the throat. Cunnilingus is oral sex performed on the vulva or vagina , while fellatio is oral sex performed on the penis. Oral sex may be performed as foreplay to incite sexual arousal before other sexual activities such as vaginal or anal intercourse ,   or as an erotic and physically intimate act in its own right. However, the transmission risk for oral sex, especially HIV transmission, is significantly lower than for vaginal or anal sex. Oral sex is often regarded as taboo ,  but most countries do not have laws which ban the practice. Commonly, people do not regard oral sex as affecting the virginity of either partner, though opinions on the matter vary.
What is oral sex?
What is oral sex? - NHS
Think about it: Oral sex puts you into contact with skin and body fluids—semen, vaginal fluids, blood, urine, feces, breast milk—any of which can contain disease-causing viruses or bacteria… And spitting out these fluids will not protect you from infection. Simple acts like shaving too close and flossing leave tiny cuts that can allow viruses and bacteria to enter the body. Sexually transmitted infections STIs that can be passed from one partner to another through oral sex include herpes, gonorrhea, chlamydia, syphillis and Human papillomavirus HPV. There are many brands, styles, types and flavors to choose from, so experiment to find one that works for you. Always have your barrier method of choice on hand.
The Risk of Going too far with oral sex
A big misconception is that oral sex is safer, in terms of preventing unplanned pregnancy and sexually transmitted infections STIs. It's true that choosing oral sex instead of vaginal sex will prevent unplanned pregnancy, but it only reduces, and does not eliminate, the risk from STIs, like herpes, which can be spread from skin-to-skin contact, as well as other STIs like chlamydia and gonorrhoea. If you are going to have oral sex, use a condom to cover the penis or a dam or cut-open condom to cover the vulva or anus to reduce the risk of infection.
By Dr George Lee. Like most men, I enjoy being the recipient of oral sex. I confess, on the other hand, I am not keen to offer oral sex to my partners. Perhaps, I am worried about hygiene and the risk of infection?