Outsmarting the Teacher

One day a teacher asked the class:
“Alright lads, imagine there are 10 birds sitting on a tree branch. If I fire one shot, how many birds are left?”
A little boy raises his hand.
“Sir, none would be left.”
The teacher shakes his head.
“No, that’s not right. There would be 9 birds left.”
The boy replies:
“Well sir, if you fire a gun, the bang would scare them all away.”
The teacher chuckles.
“Well, your answer isn’t correct mathematically, but I do like the way you think—very practical.”
The boy smiles and says:
“Sir, can I ask you a question then?”
“Go on.”
“There are three girls eating ice cream.
One is licking it, one is biting it, and one is sucking on it.
Which one is married?”
The teacher turns a bit red and says quietly:
“Uhh… I suppose… the one sucking it?”
The boy grins:
“Actually sir, the one wearing the wedding ring.
But I do like the way you think.”