As beauty is to the eye of the beholder, so too is good(or bad) advice to the ear.

The use of urine to treat jellyfish stings has been fairly well debunked, vinegar having been shown to be the only effective treatment to stop the continued stinging from tentacles lodged on the skin after initial contact.

I guess the bottom line, though, still remains: When you gotta go, you gotta go...
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The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)