What's a family tradition you didn't appreciate until you had to explain it to someone outside the family?
Could be a holiday thing, an inside joke, a meal ritual — anything that felt normal growing up until you described it to a partner or friend and realized how specific it actually was.
For me it's a "wrong answer only" round at birthday dinners. Tried explaining it to my partner and it made zero sense out loud, but everyone at the table always knows exactly what it means.
What's yours?