How I developed it
I'm sure there are a lot of people on here who went through much hardship as kids. I'm one of those who didn't. Yes, I was a bit neglected by my divorced parents who left me with my grandparents all the time, but I wasn't abused or completely ignored, just... left alone to do whatever I wanted.
I suspect this is what gave my parents the guilt to always give me whatever I asked for as a child. I unawarely exploited them when I learnt to fake my tears to get whatever toy I wanted. And they kept giving. Boy, didn't I love it. But there were other more serious mistakes:
Allowing me to borrow my grandfather's PC to start watching porn at 7 years old. Also, anyone knows Happy Tree Friends?
Receiving my first phone at 9 years old. Because why not. (in less than a week it was unusable and bombarded with porn ads lol)
Videogames were way more fun than sweating and playing with digitally unaware kids, so at 11 years old I was gifted a laptop (which I broke several times, but they kept fixing anyway), reinforcing my asociality and already settled videogame addiction. That's when I became emotionally numb and forgot basic social skills. I still struggle with this stuff.
Then I entered middle school. I was a fat ugly kid with with no social awareness. I was anxious as fuck as even just being looked at made me want to run the fuck back home ...(to masturbate and play videogames). My body was a painful humiliation to me and I wasn't even THAT awful, just an average lil' fatso. Alas, I didn't speak to anyone most days of school, which I spent fidgeting and rocking in my chair. I made it out by acting like I had a weird brain syndrome that pitied the teachers enough to let me pass :D
Highschool wasn't great either, but pretty lame and long to write about. To cut this short: I'm today an emotionally limited asshole who lies to look normal and knows the risks of spoiling kids too much.
If anyone wants to share their upbringing and how they got their NPD, I'd be glad to read it. 👍