Huh, I missed that part of middle school. Well she's 20 but acts so much younger than that. She thought I was much younger than I am so perhaps she thought I would play along.
It does seem very immature and when I did it to my partner he just looked at me.
It probably wasn't just the circle game which outed me. My hands and feet are so small it drives me crazy, that's a major clue right there.