A childhood belief about i'm different

My twin brother and I never had what you would call "imaginary friends." But what we did do, on a regular basis, was to take turns pretending to BE characters that we had invented. There were probably about 12- 14 different specific characters. They also ranged in age, gender, build, even race. Some of them were so outrageous that we've always been too embarrased to tell ANYONE about this! This isn't at all like multiple personality disorder, in that we were always aware that we were pretending. We've done this ever since we were able to interact, and at the present age of 49, we still occasionally do it for our enjoyment. I still believe, to this day, that we are to only two people to ever do this to the extent that we do!