An Irishman once told me there is an Avenue is his home town with just three trees in it.
He said a dog was walking down this Avenue and decided to do a pooh next to each of these trees.

Then the Irishman asked me to add that up and tell him the result !

I couldn´t give him the answer so he told me "10"

Do you know why the answer is "10" ?

If not, just say:

"tree and a turd" plus "tree and a turd" plus "tree and a turd" in an Irish accent, and you will see he is right!