Other studies found that the risk is very low but is not zero.
Lying on your back is the most surefire way to get off from oral, say most experts.However, it is hard to know the exact risk because a lot of people who have oral sex also have anal or vaginal sex.The type of oral sex that may be the riskiest is mouth-to-penis oral sex.Also, this position may be easier on his neck than your lying on your back, which can help him go longer, explains Cooper. Sideways 69POSE: Instead of doing the more traditional (and honestly, more clumsy) version—where one of you lies on top of the other—lie on your sides. PERK: From this vantage point, you'll have an amazing view of his body—it will be pretty obvious how much he's enjoying himself.If you feel like being generous, you can lean forward and use your hands to tease him a bit too. You on Top POSE: While he lies on the bed, straddle his face and kneel, placing your privates where they need to be. Ain't no turn-on like eye contact when he's going to town.
But the risk is still very low, and much lower than with anal or vaginal sex.