Hi, 

I assure you this is my last post on the forum for awhile, as I am certainly not trying to take advantage of the educational value and knowledge of the site.  This situation just presented itself a few hours ago and it worried me enough to purchase another question.

I was out to dinner with a friend and he took a sip of my soda using my straw. I immediately turned the straw upside down, put it back in my soda, and drank from the opposite side for the remainder of the drink. I have never been worried about sharing drinks before, however with my recent HSV research and inquisitions regarding my previous situation, I am hypersensitive at the moment. I did not see a cold sore on his lips, but I asked if he ever got a cold sore and he replied, "I don't think so." He knew cold sores are a form of herpes, but he asked questions about what cold sores look like, if they are strictly outside the mouth etc. (I believe he has experienced some kind of sores IN the mouth before-he has had two sex partners: one was a virgiAfter explaining more about them, he said he has never had one. Of course, I know people who have never experienced cold sores can mistake them for other things. I am also aware that some people have cold sores  caused by HSV2. If he has, in fact, had cold sores before and his are caused by HSV2, what are the chances of acquiring oral HSV2 from him sipping from my straw and me drinking from it?  I peeled a layer of chapped skin from my bottom lip shortly before dinner, so I had exposed skin at the time. I am worried about the possibility of acquiring new infection, as shedding occurs from saliva asymptomaticly. 

I apologize for asking such a ludicrous question on the forum, as I am sure I am very far fetched here, I just really need some peace of mind before I kiss/have oral sex with my boyfriend.  I am trying very hard to use logic and scientific information to calm my fears- but I find you are the most reliable source I have and trust for accuracy. Thank you. 

1- I am glad to hear you say there is zero risk. I know I turned the straw upside down, but I also know my skin was exposed and I drank from the side of the cup as well so I'm not 100% confident my lips did not touch the glass or straw where his lips were. I know the mouth is susceptible through mucous membranes.  Would you mind explaining to me why the encounter I described is zero risk so that I can use these facts and logic to stop illogical, worrisome thoughts?