When someone asks me if I mind if they borrow some insignificant shit like a piece of paper, so I respond "no, not at all" like a proper Brit to tell them they can have it. Then they get confused and offended at me responding in a grammatically appropriate manner, so I have to give them a English lesson explaining responding no means yes they can borrow it. Then when it's all done and said I wasted like 2 minutes of my day trying to teach an English class to explain ass backwards manners of Jedi Mind trick Yoda reverse double negative speech.
Either that or just respond in the completely nonsensical contradictory manner "yeah, go ahead" which everyone universally understands as a positive answer, despite it being the exact opposite.