You can still spread herpes without having any signs or symptoms, I personally don't recommend going down on him/having sex if you know he has herpes with out protection if you do not wish to contract it.
Yes but they say over and over the docs, NP's, people, etc. that hsv 2 prefers the genitals to the mouth and hsv 1 prefers the mouth so if You have hsv 1 genitally it will be less outbreaks than hsv 2 and vice versa. Hope this helps. take care, EB