Explain this riddle to me please!?!

Question: If a fire hydrant has H20 inside, what does it have on the outside?

K9P...

a little explanation please!

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Answers: If a fire hydrant has H20 inside, what does it have on the outside?

K9P...

a little explanation please!

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a k9 is a canine (dog) and pee is self explanatory. Dogs for some strange reason, love to pee on fire hydrants.

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k9 = Canine = dog
P = Pee

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read it aloud:

canine pee

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dog p*ss...
who,d be a fireman???

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You have to read it aloud and twice.

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k9p?
dogs pee on them? k9 dog? omgosh

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