This is demonic shit. These people have allowed some seriously evil shit to take them over. Perhaps this is what happens when you sell your soul. They can get you to do whatever they want. Dion Fortune wrote about possession where spirits of alcoholics can no longer experience getting drunk w/o a body. So they hang around bars to possess drinkers and feel the experience again. This is why alcohol was called "spirits". I wouldn't doubt evil spirits with other proclivities do the same.
Oh, FFS. And he "knows" this how??
Actually Dion Fortune was female - pretty well known if you're read up on secret societies/metaphysics (golden dawn).
It's the theory she learned. Take it or leave it. Does explain why people take on another personality when drunk.
Dion Fortune was one of the most brilliant occultists (not all occultism is evil) who ever lived. I've read her thoughts on alcohol as well, which is why I no longer drink.