I have ghsv-1 but I couldn't tell you if it was from oral or regular sex. No one I was with had cold sores *to my knowledge, but then again, I guess my BEST friend use to get them, and I never knew that either. Also, didn't know they had it genitally if they did either. The unsolved mystery.
I actually brought up oral sex to my current boyfriend, that is the one thing he won't do since I found out about H (to me, he accepts blowjobs no problem, haha.) I said, if you already ever had cold sores its not like I can give it to you again, at first he was adamant that he has never had cold sores, but when I brought it up again recently he said maybe when he was a kid he did. So.... even if he never got another cold sore its still in his body! Just shows, if it was so long ago people don't even remember! Scary thought.