I have single skin colored smooth perfectly round raised bump about 1/2 way down the shaft of my penis about the size of a ballpoint pen head. I remember having this for a while like 6-12 months and never thought anything about it until recently. It hasn't changed in size or appearance and I have not had even protected vaginal sex with anyone other than my wife for about 7 years with the exception of receiving some random oral and hj's. Anything I should be concerned about or am I just freaking out over nothing.