I have a small "tunnel" like thing on the top of my penile shaft.  I've noticed it before but didn't think anything of it.  Then a small brownish/black "seed" like dot or ball formed at the end of the "tunnel".  It easily came off when I pulled on it.  Nothing has grown back or since.  It doesn't hurt, or it isn't sensitive at all.  Oh and the tunnel, when pinched is hard, and when I pull the skin taut, its hard, but when i don't do anything, you might not see it.  I don't know what it is, i dont think its a sebaceous deposit, but i'm not a doctor.  Any help? thanks.
                                                        
                                                     
                                                    
                                                        
                                                            
                                                            
                                                            
                                                                posted on
                                                            
                                                                Wed, 3 Jul 2013 
                                                            
                                                            
                                                            
                                                            
                                                                
                                                                    
                                                                    
                                                                    Wed, 3 Jul 2013
                                                                    
                                                                    
  Answered on 
                                                                 
                                                                
                                                                    
                                                                    
                                                                    Thu, 4 Jul 2013
                                                                    
                                                                    
  Last reviewed on