Which one is the married one

Teacher:- "Right, there are five birds sitting on a telephone line. A farmer comes along with his gun and shoots one of them. How many are left?"

Little Johnny:- "None Miss".

Teacher:- "Could you tell me why?"

Little Johnny:- "Well Miss, when the farmer shot the bird, the sound of the gun would have frightened the other birds away".

Teacher:- "Well, the answer I was looking for was four. But I like your thinking."

Little Johnny:- "Miss, while were asking questions, could I ask you one?"

Teacher:- "Its a bit irregular, but go on then"

Little Johnny:- "There are three women sitting on a bench in the park, eating ice lollies. One of them is licking the lolly; one is biting it; and one is putting it in and out of her mouth. Which one is married?"

Teacher (rather embarrassed):- "Err... I suppose it was the last one."

Little Johnny:- "Well Id have said the one with the wedding ring. But I like your thinking."