The other day I realized that I hadn't showered all weekend. So without haste I hopped in the shower and went on with my typical procedure working from my feet up and I realized a little red mark on the tip of my penis right below the left side(my left) of the "exit" hole. (for lack of a better term) it's not prominent, doesn't stick out. There's no sores (like herpes), it's a little dry and the skin is a little white from very minor peeling. (i also have a nickle allergy. My belt tends to break out my stomach. Nothing big, just a little irritation.)
i've only been sexually active a few times. And with a girl who's never done anything, so i'm sure everything's fine.
Anyway, I flipped out. I cleaned it and did everything and proceeded to examine it after the shower. I went to school and it checked it every so often. There's no burning, no pain, no discharge or anything. I'm just supposing it's a fungal irritation from not showering for a day or two. I've only seen this for a day and if it's still there at the end of the week i'll be seeing a doctor.
If you've only been with one girl, and she hasn't been with anyone else, then I think you're right, std's are outta the question.
It might not have been the result of not showering for a weekend, I know that sometimes guys just "happen" to get things like that.. If I can find specific information on it, i'll post it in here.
But if you're not having any weird symptoms, then i'm sure you're fine. It's important to shower nonetheless *shakes finger* lol, make sure your boxers or breifs or whatever aren't too clingy, and that you give your "area" some time to breathe.. Cause I know sometimes that can cause irritation.
Seriously though, it's all good, keep an eye on it, and if I get that info i'll edit this post.