I feel like a completely ridiculous excuse for an adult but the other day I found out the difference between cottage pie and shepherds pie.
I am in my 30s and gobsmacked (also feel a bit stupid now it's so obvious). I genuinely thought they were the same thing.
Is there anything you discovered as an adult that was just common knowledge to everyone else? Or perhaps there's a phrase you've found out you have been saying wrong all this time etc...!
Help me feel a bit better.