How does a Demon Enter a Human Host's Body?

Demons cannot apparently enter and indwell a person who is focused to his or her environment and alert to his own thoughts and actions. It is when the potential host allows external inputs, stimuli, and experiences to so take over and become his own thought processing, that a Demon can move in through the stimulus created gap in mental awareness. Think about reading Tom Sawyer or any other novel.  The reader gets so involve in what the character is thinking and doing that for a brief period the reader feels as if they really are Tom Sawyer. Fortunately Demons are not into Tom Sawyer, they prefer Harry Potter, zombies, porn, and gory novels.
Demons all have their own favorite sins. An old farmer once put it this way, “The old Devil sure knows what you like in your soup”. Demons were tempted to follow Satan out of Heaven because of their own personal temptations. Demons specialize. Perhaps nothing explains it better than Pokémon Cards. On the back of each card is a summary of the particular demonic powers of that particular Demon. I personally believe that Satan and his Demons played a very scary and dirty joke on society by using actual Personal names and descriptions of all too real Demons on these cards. Whatever you do, don’t let children play with these cards, don’t hid them or bury them where some unfortunate might find them, Burn them,

So what are the most likely vehicles in today’s busy society where Demons might find easy entry to a human host? Here is a partial list:

Harry Potter and/or any other book, tape or video on the Occult
Video Games, especially the bloody gory ones and repetitive shooting of lifelike human victims
Pokémon (Japanese for Monster or Demon) esp. dangerous, 
Pornography
Gambling, especially online where the gambler is alone with his vice
Horror, Vampire, and Zombie Movies
Drugs and Alcohol including all Prescription Drugs, esp. anti-Psychotics and pain pills
Pot I’ll list separately since so many in today’s society wrongly don’t consider it a drug
Runaway Anger
Rap and heavy metal music
Indoctrination tapes
Horoscopes, Ouija boards, Crystal balls, and Tarot Cards
Indoctrination by Islam and other cults, gangs, and association with criminals

 

The Scriptures tell us how to avoid Demons and Temptations in general.

 Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.

Phil 4:8 (KJV)
 
When we genuinely focus on the good stuff, the bad stuff can’t hurt us, even Satanic forces.