I have felt my deceased brother around me at bedtime only twice. The first time was just after he accidentally killed himself in a motorcycle accident and came to me to appologize. The second time was when I was having some trouble sleeping and it felt as if he layed down next to me as if to comfort me to sleep. As twins we already have a connection so it did not seem suspicious to me at all and at no time did I think it was an evil spirit trying to be "nasty". I have also felt the presence of my deceased grandfather, who died in the house I was sleeping in at the time, who touched the back of my shoulder.