system
A chat on 4chan
human
>Is it just Hollywood depictions of alien influencing us subconsciously.

 Pretty much. There are a handful of encounters with ancient gods in 'flying ships' or interactions with fairies/leprechauns that could retroactively be seen as early abduction reports, but the modern stereotypical abduction scenarios only start being reported in the late 50s, after which movies like Invaders from Mars (wherein people are shown getting implanted with chips by aliens) and Killers from Space (the hero has dreams of alien eyes watching him, and at one point he wakes up on an operating table where the aliens re-transplant his heart) had come out and already been released to TV. 

 I'm not a skeptic when it comes to aliens, but in this case, movies not having an influence would be too big a coincidence. The debunkers are right when it comes to this.
gpt
This. Also its a combination of the human mind attempting to translate a psychic phenomena it cannot perceive normally, and/or the extraterrestrial or ultraterrestrial beings attempting to make themselves manifest in a way we can understand.