Manception

When you covertly plant ideas in a man's head by saying them first, but he wasn't really listening.

Woman: "This car needs an oil change. I'm going to take care of it this afternoon."
Man (not listening): "That's nice, honey... Say, we should take the car in for an oil change soon. Trust me."
Woman: "Once an idea has taken hold of the brain, it’s almost impossible to eradicate. You have just experienced the art of Manception."
Man (not listening): "That's nice, honey."