Hauntings Explained

I've solved the centuries old mystery of hauntings. At least some of them can be explained by the low iron levels of old people. Anaemia can cause restlessness, a feeling of confusion and insomnia. It can cause old people to wake up in the middle of the night feeling unsettled, and then wander around their home bumping into furniture due to their night-blindness, moaning and groaning, and wearing white dressing gowns - traditional nightclothes from the early part of the last century. After carrying out their haunting for an hour or so, they exhaust themselves and fall into slumber again. And when they wake up in the morning, they have no knowledge of their nocturnal activities due to their forgetfulness. So the next time you see or hear a ghostly presence wandering around, have pity on them, don't fear them. And hand them some iron tablets to treat their anaemia.

UPDATE - I apologise for denigrating "old" people, and will instead refer to them as "wrinklies" from now on.