This is a normal situation. There are a number of men who have those bumps and they are usually do to friction. Without being too graphic, I too have those bumps and had them checked awhile back (high school) and was told they were not abnormal.
Sounds like penial papulas to me. Nothing to worry about.
Hey guys.. please look at my post. I have a picture of my problem. Is this the same thing you're talking about?
http://www.medhelp.org/posts/show/404918