Hey Pandas, What's The Thing You've Considered 'Normal' While Growing Up, Only To Find Out It's Actually Weird?

When I was little, about 2-3, I had a rubber snake. It was one of the ones you'd get from a zoo gift shop. I bit off pieces of the tail, thinking it was normal, and ate it. I did this until I was about 5 when I realized it didn't taste that good. Now the snake has some of its tail chopped off.