I have red bumps on my penis and scrotum. They don't itch or hurt or anything. They're all pretty small and in a cluster. I took a few pictures to help, but I don't know how to show them on this site.
I'm sure you've had your question answered by now, but I wanted to post here in case it helps anyone else.
There are many non STI related reasons for bumps on your penis. Check out this link and see if any of these descriptions apply to you:
Genital Bumps, Lesions, Sores, Warts, Scabs and Ulcers in Men
You may have Fordyce spots, papules, or any one of a number of other bumps that aren't infectious and don't require treatment. But of course it's always best to make sure, so I'd advise you to have your doctor check them out, just in case.
Hope that helps!
At least, it is not herpes.