DS is 12 and we are starting to get some of that. We read a book a year ago in which the mom had second name "Phil" that she used to describe the surly/huffy/unreachable version of her DS. My DS thought that was funny and has given himself an alter-ego- "Tom." When DS is "Tom" he is still unreachable, but once he feels more like himself again, we can discuss our visit from "Tom." And we both have a chuckle.