I happen to be an MD, and yes there is a risk. We used to think that once the lesions had fully crusted over and healed, there was no viral shedding. Just isn't so. Just who is and who is not shedding is almost impossible to determine. But I've got a patient who came down with a rip roaring first time case of Herpes II on the mouth from kissing a girl (yuch). She had no sores, apparently the boyfriend whose dick she had been sucking had no sores, but my kid got really sick. Interestingly though, he has never had a second outbreak. Cold sore herpes, invariably reactivates on the mouth, as does herpes herpes on the dick or butt. Moral of the story - don't kiss girls.