One day, in math class, a teacher asked little Johnny a question to test if he had learned subtraction. "If there are three crows on a fence, and the farmer shoots one of them, how many are left?"

"None," Johnny replied.

"No, that's the wrong answer. You didn't listen to the question," the teacher said. "If there are three crows on a fence, and the farmer shoots one of them, how many are left?"

"None," Johnny replied. "When the farmer shoots one of them, the other two will fly off."

"That's still the wrong answer, Johnny" the teacher said, "but I like your way of thinking."

"Right, well I've got a question for you Miss" said Johnny.

"Three women are walking down the street,all with ice lollies. The first is licking her ice lolly, the second is sucking hers, and the third is biting hers. Which one is married?"

The teacher thought about it for a minute, then said: "I think it would have to be the one sucking the ice lolly."

Johnny said back to her: "Nope, it's the one wearing a wedding ring, but I like your way of thinking."