why somebody always makes some dull question??

Because they can't think of a much better question? :D Well, that depends maybe on who is reading or answering the question. Some people may consider a question like yours funny, some may consider it boastful (like reviewing all the questions you have posted so far to check if they are not dull...lol), some may give their full concentration just so they can provide you with an answer and some may even say, "Hey, why didn't I ask that question before?"

Lack of words in order to express it in dynamic/ exciting way.

Hello...I think this is a very relative thing..same question may appear very exciting to ome person and at the same time quite boring to another..its quite subjevtive I think...

Al cannot be smart.But we all can learn from others.Some people never learn.That is the main problem.Moreover in person atleast they will try to act smart and when their identity is covered they show their real colors of dullness gleefully.

i dont know why do they,sometimes they are dull to some and not to others

Perhaps they are a dull person? LOL. Or perhaps they are just doing this for the money (which is pretty dull as in not-too-bright on it's own), not to gain any insight or have any meaningful interaction. Perhaps what you find dull is scintillating to someone else. Perhaps this is a dull question. LOL. Obviously, I find it interesting enough to respond. :D Hope you get some good answers.

maybe so that they can just ask a question. this one could probably fall into that category.. dont u think?

I DNT KNOW WHY

because people tend to answer crap questions than sensible ones out here. so i dropped worryin about it. maybe even you should.