Even though I had no signs of std and even got a thumbs up from a doctor in the past, my ex seemed to get cold sores after giving me oral, and she also had pretty frequent yeast infections. Yet I never had anything or symptoms. Even asked about tests years later, still clean. Sharing this info that maybe others have similar experiences One of her friends by the way suggested that there was an unknown part of her past or while with me. Who knows …..