Congratulations. It is good of your BF to have told you of his infection and the two of you are doing things exactly right. Condoms and preventative therapy with a medication such as valacyclovir are the cornerstones of prevention of transmission. At the same time, the topic of herpes is a complex one. The disease is common with HSV-1 being present in over 60% of adults and HSV-2 (the virus which causes most genital herpes) being present in about 1 in 5 Americans. For both infections, the majority of people who have the infections are not aware that they are infected, either because they either acquired it without knowing in the past or because they misidentified their herpes as something else. I will do my best to answer your questions but in general, many of these questions and information about herpes can be obtained by accessing excellent informational web sites such as the one run by the American Social Health Association (disclosure, Dr. Handsfield and I are both on the Board of Directors of ASHA).
As for your questions:
1. It would be most unusual for him to have the same type of HSV infection both on his mouth and genitals. Statistically, if he has genital recurrences, they are most likely to be HSV-2. His blood test results should help to sort this out.
2. His performing oral sex on you unprotected is very low risk. For you, using a condom is a good idea unless (see below)
3. Unlikely to be a concern for you.
4. No other precautions needed. For him to keep his underwear on is not necessary.
One other suggestion (this is the "unless" I mentioned above). I would advise you to have a blood test as well. Surprisingly but as you've inferred above, you could have gotten either HSV -1 or-2 at some time in the past and not know it. Knowing if you have the same or a different HSV type might influence future interactions between the two of you. If you are both infected with the same type, then no need for precautions of any type If one is infected and the other is not, then the precautions you describe are right on target.
Hope this helps and my congratulations to you both for the mature and appropriate way you are approaching this. EWH
Thanks Dr. Hook, we appreciate your guidance and I'll review the information on the ASHA site as well. Again, thanks, you've made two people (and anyone else who reads this one) better informed and more at ease with moving into this phase of our relationship.
All our best!