The Mermaid Mystery

A girl on a message-board says she's never heard of The Little Mermaid. I am greatly disturbed. HOW CAN THAT BE POSSIBLE?
Then I do a little research on IMDB, only to find that the movie came out in 1989. I was three. How did I see it? And she's probably about thirteen years old, meaning that she would not be born for another three years. We are old, you know? In case you forgot.