I believe archangelbeth was the one to post a comment regarding a statistic that stated that those with HSV-1 were (40%?) less likely to contract HSV-2. I'd love to read up on that on my own. PLEASE correct me if I'm wrong or misread this. (And I'll do my best to edit the post to cross-out this info so others aren't misinformed).
This isn't an urgent concern, but general curiosity sparked by a recent conversation with a friend.
Edit: I found the link! http://www.herpes.com/hsv1-2.html
Those who have a prior infection with HSV-1 have an acquired immune response that lowers - though certainly doesn't eliminate-the risk of acquiring HSV-2. According to one study (Mertz, Annals of Internal Medicine,1992), previous oral HSV-1 infection reduces the acquisition of subsequent HSV-2 infection by 40%.
It wasn't the post I was originally looking for, but I did find one in the archives. :)