Vain Zhang Nan, from Hubei province, central China, had gone for a beauty treatment as part of this he climbed into the bath with young eels to become younger.
He heard that the young eels will chew off dead skin then the older people will also look younger after this treatment.

The 56 year old said, “When, I was in bath with the animals, I got severe pain and found that a small eel had gone into the end of my penis.  I tried to hold it and take it out, but the eel was too slippery to be held and disappeared.”
After that, he went for 3 hours emergency treatment, when doctor found the dead eel inside his bladder.