It was just a silly story.
3 seconds sound clip from The New Adventures of Winnie the Pooh - No Rabbit's a Fortress / The Monster Frankenpooh (S2E6).
You can hear this line at 00:20:48.036 in the Blu-ray version of the TV Series.
Quote context
[...]
- He's the one that made the monster. Let's boil him in tomato juice! Yee!
- Please. It was an accident. I didn't mean to do it. Honest.
- I just wanted it to be a nice not-so-scary story.
- But, Pigalet, there's nothing to get so upset about.
- Of course, Piglet. There was no monster.
- No?
- You really should learn the difference between what's real and what isn't.
- Yes, Piglet, you really should. And so should I. Oh, bother.
- We are?
[...]