i went to a 'highly gifted' school specifically designed for students who were interested in law and government so that just goes to showww...something
not to antogonize you, but you can still be an S and be very intelligent. There is an anti S bent on this board, but in real life I have known some very "gifted" ISTPs and ISTJs. (not that i think you're either of those types). I just thought i'd toss that out there in case you had some fear of being called an S. (im not going as far as to say that you are an S...ive just noticed a lot of people saying that you might be an S)
oh and I know a self professed ENFJ that is equally as silly as you are when shes not in "act appropriate mode". The difference is that she recognized her silliness as the Se outlet rather than actually being a sort of Ne. I could see you being a rather silly ENFJ... it would explain a lot.
Accept the past. Live for the present. Look forward to the future. Robot Fusion
"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
"[A] scientist looking at nonscientific problems is just as dumb as the next guy." Richard Feynman
"[P]etabytes of  data is not the same thing as understanding emergent mechanisms and structures." Jim Crutchfield