Unsolved mystery

I think our lamp is possessed. Well, two of them actually. Two days ago, I went to get Sean up in the morning, and the little touch lamp in his room was on. I'd assumed that Nate had gone in for some reason and left it on. The next day, though, I woke up in my room to find that the matching lamp in my room was on. I went into Sean's room, and his was on, too. I turned them both off, and mine stayed off, but his kept turning back on. This morning was the freakiest, though. There are three settings to the lamp, and this morning, it woke me up by flashing from the middle to the brightest setting and back, over and over. The only way I made it stop was to unplug it. Hmm...I think we have a ghost in the house.