Wow, I didn't even realise this was a thing, I just thought I was weird ( still do it).

When I was 9-ish my mum bought Men in Black 2 for my birthday, I loved the men in black series, but I always got this weird feeling at the start of the second movie when the alien women devours a guy that gives her a huge belly. I always felt like I shouldn't be watching that scene, especially with other people.

So my guess is I was born with a fat fetish, I just didn't realize it was a thing until later on in life.

Also everything promoting "thin" back then.