How do you know when your house misses someone?

Is it when things items like a touch lamp keep turning themselves on?

Yes, the lamp on PB's side of the bed kept turning on last night. I shut it off right before I fell asleep. I woke up at least 3 times and shut it off over the course of the night. Needless to say I didn't sleep too well and was kind of freaked out. But hey, at least the spirit was just keeping me lit up!