if you must know, here is the story. it had nothing to do with "holding it in" or anything
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Ilarie Coroiu was taken to hospital in the Transylvanian town of Cluj after his girlfriend, Magdalena, 18, "felt something strange" and noticed that the bed was covered in blood.
Dr Angela Domocos, head of the accident and emergency department at Cluj General Hospital, said: "It is very rare for this to happen. We call it an exploded penis because it happens when the blood cavities in the penis burst." (quoted from Ananova.com.)