Around November last year I shared my Vaseline with a friend. The next day he had a coldsore on his mouth and said it was my fault but I took no notice of it at all. I didn t think it was anything to do with me. A week ago my boyfriend gave me oral for the first time & 5 days after he had a coldsore. I didn t think I could be me at first since he s the only sexual partner I ve had and my personal hygene is very good. As a child I did catch a coldsore from a family member but for 10 years I haven t had any symptoms of the herpes virus. Did my boyfriend catch heroes from giving me oral sex or could there be another reason?