Hi. So let me start off by saying Im bisexual. My partner told me she has a Canker Sore in her mouth, and got it a week after performing oral sex on me. She claims it has happened once before. But we have had sex more than that. My deal is, because Im bisexual, I get tested more than 2 times a year. I just got tested in January and been with only her since December. I was clean. MY question is, can you get Canker Sores from performing Oral Sex?