I am unsure. Perhaps they are not weird, simply different? I appreciate intelligence, even more so when it surprises me. The thought he puts into his pranks and jokes - as ridiculous and silly they may be - is nothing short of focused and concentrating. And really, they are quite clever in nature. Not to mention the fact that he astounds me with how much he can figure out on his own once you've given him the foundation.
Action;
Why do you find such a trait so deplorable?