Alcohol can provide additional hit. It does not give a buzz. It is also necessary for thinning non-water-soluble flavorings, menthol crystals, ethyl maltol flavoring crystals so some liquids already have some alcohol in them. I am just telling you the two things that can be used to improve the flow of VG juices. The 3rd is PG liquid.
I use a bit of grain alcohol with a small dropper to loosen up my carto stuffing if I've used too thick a
juice and wish I had not.