Silver Surfer
True story.

A friend has a rental property, he wanted to check up on his new tenants - so I went with him. He rented it to students from Euro, they all went into the bathroom and the renters had what looked like a keypad attached to the toilet.

'What's that'? says landlord,

'Prepare to be amazed'! says tenant

Tenant pushed a button on a converter and jet of water fired out of the toilet and hit landlord in the face.

'Oh, it's a bidet'. says landlord, without batting an eye. Everyone then quietly shuffled out of the bathroom.