All kinds of people are possessed by demons every day. You meet them, you talk to them, and you never realize that you are talking to a demonic entity that is in control of the person's body. These demons don't take permanent control, they drop into the body for a short time, then drop out again, and the possessed person has no idea that they were possessed. To them, it just seems as though they were daydreaming, or fell asleep for a few hours. They may or may not even notice the passage of time. Some individuals are more open to demonic possession than others. Those who are drug addicts, alcoholics, and those who are not reflective intellectually are more vulnerable. By "not reflective" I mean those who react to life automatically, without thinking about what is happening around them or what they are doing, or why. They live in a kind of trance state, half-asleep, and demons find it easy to take over their bodies because their mental focus is so tenuous.