i have a sore on penis shaft after unprotected sex, its small and sore when masterbating, the surface skin is broken, the actual small little sore is maybe an 1/8 of an inch. very small. but sore indeed, i have slept around and not proud of it, but I m in dire need of explanation as i work overseas and medical care is not available. i frequently excessively masterbate as well. please could i have a list of potential viruses or deceases which may be linked to this small issue?