My Younger Brother Thinks I'm Perfectly Ordinary, Here's the Truth!

So, here’s a thing about my younger brother. He thinks that I’m just an ordinary older sister, you know? But let me tell you a secret: if he only knew the true extent of my wild and crazy antics behind closed doors! I’ve been known to eat an entire tub of cookie dough in one sitting (yes, it’s a sad reality), and I once convinced our parents that aliens had abducted all their salt so they could stock up on more. But the biggest secret? My diary is actually filled with hilarious jokes instead of angsty teenage drama. He has no clue! So here’s my question: Am I totally nuts to keep these things hidden, or do all big siblings have a bit of mischief in them too? Tell me your secrets and whether this kind of sibling deception is just normal.