What is the probability of contracting genital herpes from oral sex?
Nobody really knows the answer to this question. But it doesnt seem to be very likely at all. More than half of the entire human population has oral herpes, and more than half of the entire human population enjoys oral sex on a regular basis. If there were a significant risk of oral-genital transmission when sores are not present, one would expect that genital herpes would be far more prevalent than it is.