A certain naughty item

"Here we are, princess. The item I have been crafting all day and night long."

The wizard approached her and produced a small velvet-colored box from the pocket of his robe. He then opened it, to reveal a pure white pearl inside.

"The Truth Pearl. It is my answer to your request of making a magical item that will make you never be made a fool by others. It will show you when a person is speaking untruth."

The princess clasped her hand happily before receiving the gift. Now she would finally received the respect she deserved!

"...Unfortunately, princess, the way you wear it might be a little... indecent, to say lightly."

"E-eh, how so?" The princess responded with a confused look on her face.

"You see, it needs to be put inside your... ahem, sex, in order for it to work. There, it will vibrate when someone is lying to you."

The princess blushed crimson red.

"I shall give it to you. It will be up to you whether you want to wear it or not. Surely a little stimulation won't be harmful at all."

The wizard puts the box in her hand before continuing on his work.