I recently had oral sex with a woman, and then we had protected intercourse. I have read other sites about the symptoms of STDs and I had a question about where sores from syphilis will occur. Since I had oral sex, on her, is it possible that I could get a sore on my leg or will the sores (if there are to be any!)? An unexplained sore appeared on my leg and my experience with this woman has me a little freaked out.