Wow Aculady, That sounds a lot like my DS. Especially the sense of humor part. Its very hard watching him try to understand humor and always seems to laugh at the oddest things. He actually has a dual dx of ADHD/ODD but the description of the arguing with parents seems more in line then some of the descriptions of ODD kids. The lack of empathy also seemed very familiar. Once you explain it to him he can see it (well sorta) but he never sees it on his own.