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Don't Keep Random Keys. If you find a key, it's not yours. Don't be a greedy fool.
I found a key on the floor. I kept it. Now I have no idea where it goes. Stupid me.
My friend found a key. He kept it. Now he's stuck in a random room with no exit. Loser.
You found a key. You kept it. Now you're the reason we're all stuck here. You're the worst.