The days when I could mess with my kids' heads are long gone, though I still try. After all, it's a well-established tradition in my family.
By the time my much younger sister, Rachel, started talking, my brothers and I were teenagers. When she was learning her alphabet, I decided to help her out.
She never quite believed me, but as long as I could detect an element of doubt in her, I felt obligated to continue with the farce.
Who had her monthlies twice a week.
To this day, she refuses to teach me the words. Knowing her, I suspect it's not really rude, but there's still an element of doubt in my mind. However, I can't bring myself to Google it—I wouldn't want to spoil the fun.
Do other families mess with their kids' heads as much as my family does?