Aspergers ranges from severe to mild to "aspy-ish". I find that lots of kids I see in my practice with ASD have very wicked and dry senses of humor. They also tend to be the least impaired. Again with the imaginary play...see it a lot - often in their field of expertise. They have a much harder time engaging in another's imaginary play where they have no input or control.
You ds' sense of humor is an asset he can use to connect with others.
ok, that makes sense! ... DS4 has a great imagination but I don't think I've ever seen him try to join someone else's play ... even just now I was babysitting a friend's daughter 3 months older than him and she was pretending that magnetic pictures on a cookie sheet were "cookies" offering some to my son and he was just about to loose it trying to explain to her for the 10th time that these are NOT COOKIES! THEY ARE MAGNETS!
I guess with all that's going on, the imagination and all his joking around is a good thing!
