What's the best prank to slowly **** with someone's mind over time?

Source.

By Some of the people from my past i would say friendship

Find out where their junk drawer is, everytime you come over add something random ,like a condom, hotel soap, stickers...etc.

I'm gonna try that on someone now ; )

My sister has one of those grocery list things that is magnetized. She has the usual on it, bread,milk, the like. Just to screw with her evry once and a while I'd add "1/4 lb of fresh diced monkey or some crap like that. Pis ses her off every time.

Lmao i think gods doing that to me now he's takeing hair off my head and growing it out my ears and nose lol
and yes i do trim it lol

Marry them... Lol

Change the tags on someone's clothes if they are trying to loose or gain weight, even change out their clothes. It makes them nuts.

IM Pregnant!!!!! See How he Reacts...

The thread question made me think, "what would really confuse em that couldn't be pinned on me?" Lol!