5 black birds

A little boy is in school working on his arithmetic.  The teacher says,
"Imagine there are 5 black birds sitting on a fence.  You pick up your
BB gun and shoot one.  How many blackbirds are left?"

The little boy thinks for a moment and says, "NONE!"

The teacher replies, "None, how do you figure that?"

The little boy says, if I shoot one, all the other birds will fly away
scared, leaving none on the fence."

The teacher replies, "Hmm, not exactly, but I do like the way you think!"

The little boy then says, "Teacher, let me ask you a question.
There are 3 women sitting on a park bench eating ice cream cones.  One is
licking her cone, another is biting it and the third one is sucking it.
How can you tell which one of the women is married?"

The teacher ponders the question uncomfortably and then finally replies,
"Well, I guess the one sucking her cone."

To which the little boy replies, "Actually, its the one with the wedding
ring, but I do like the way YOU think!!"