If you're concerned about these behaviours I'd definitely be asking. It might just be him being a bit more cantankerous than other 2yr olds, but it could be something like aspergers which is not necessarily that terrible although it could be.
The point is, better to know than not. Perhaps if there is a problem there will be things you can do to make your life and his a bit easier.
I'm sure it's probably just a very active imagination.
ETA: Actually, sometimes I think my husband has aspergers. His social skills are terrible, he's incredibly clumsy and he has some very weird ideas about how the world works. lol So dont worry, even if he does have something like aspergers he could still have a wonderful life and marry a fantastic chick like me and make babies.
