Welcome to Just Answer and thanks for your question. If the woman has an HSV-2 (genital herpes) infection in her mouth then she can spread it to the man. Likewise, if he has a genital herpes infection in his mouth or on his genitals, he can spread it to her. If anyone has a HSV-1 (oral herpes/fever blister) on his or her mouth, they can also spread that to the genitals of another person.
No. It isn't passed through saliva, it is passed from oral lesions, or touching the oral mucosa. You can read more about it here.