I guess you say kissing is no risk for every possible scenario but I have to ask some questions. I kissed a street sex worker on her lips just for 2-3 seconds and no tongue or deep kissing was involved (Only our lips touched each other, like a lip to lip kiss). I can't remember if my mouth was open or closed while kissing. I had white canker sore below my inner lip inside my mouth at that time. So my questions are:
1)If both people have chapped lips and their lips are bleeding because of that, is kissing still no risk? (I mean zero risk really?) Because there is no saliva at the outside of the lips is it possible to get infected? If it is no risk why?
2)Does kissing with canker sores poses any risk? What if infected person's blood somehow touches the canker sore?
3)Is a test required for these?