I am a 37 year old male in a monogomous relationship for the past 4 months, and am otherwise normal and healthy. Prior to that, sexual relations have always involved a condom (except in long-term monogomous relationships), although oral sex has not always. Approximately seven months ago, however, a woman who I did not know well (think alcohol-charged one night stand) did put her mouth on my penis briefly (approx. 5 seconds) before I stopped her (because I did not know her). (What a prude I am.)
Over the past few months, I have noticed a couple of red spots on the head of my penis following sex. They typically appear shortly after sex (i.e., shortly after removing the condom), and remain roughly for up to two days, although they fade over that roughly two day period. In other words, they appear and fade, until the next sexual episode. If there is sex on day one, they are generally faded back to normal skin on day three. They always appear at the same place on the head of my penis. They are not large and not raised, but they are definately redder than the other skin surrounding them. They sometimes appear almost shimmery once in the fading process. They are not blisters, do not produce any liquid, and do not form a crust. They do not cause pain, although they do cause a little discomfort (almost an irritation). If the head of the penis is composed of certain almost "skin grooves," then this is a reddening of one area of one such "groove." (I don't know how else to describe it.) Their first appearance did not coincide with any other symptons (so far as I can recall), such as fever, swollen glands, pain, leg pain or the like. I don't know how otherwise to describe them other than to say they are a couple of red spots that have come and gone over the past month or so and their appearance is associated with sexual activity.
My questions are the following:
1. Could an STD be transmitted in such a brief period of time as the 5 second or so episode as described above? (Obviously I'm quite concerned with that episode because I'm generally very safe.)
2. Could those red spots be a STD?
3. If not, what other possible causes could there be?
4. If it is simply irritation of what is somewhat sensitive
skin (which I suspect it to be), why would it appear consistently in the same spot?
5. If it is simply irritation, what suggestions do you have to (a) treat the irritation and (b) avoid the irritation in the future.
Many thanks.