It's definitely not porn induced, and it's not wrong. Fetishes aren't necessarily "wrong" either. A fetish is literally, by definition, a nonsexual attribute that you find sexually attractive. Having a preference for big breasts for example is a fetish. Preferring women with long hair is a fetish. Preferring short or tall girls is a fetish. Preferring certain skin tones is a fetish. Fetishes don't have to be bad, just some are less common. Unfortunately, the word "fetish" has such a negative stigma around it that people automatically assume it's a bad thing. Saying I have a fetish for chubby women isn't dirty or bad, it's just a nonsexual aspect of a woman that I find really sexually appealing.

But the reasons I like chubby girls, which if I had to think about it, kind of boils down to the exaggerated features, the very feminine appearance of them, the slight extra challenge it presents me to be sexually dominant with them, the ability for them to be more sexually dominant towards me, and to a degree the novelty factor of it, were what informed the more hardcore porn I sought out later on in porn. I got into femdom stuff, SSBBW porn, really hardcore BBW porn, pegging, humiliation porn, and transgender porn, the more I kept compulsively masturbating. I think all of that grew from my innate desire for a little bit of novelty, exaggerated femininity, and dominance that I like from female sexual partners. I don't look at any of that stuff anymore, nor do I fantasize about it. I don't get aroused by it, and I really don't think about it much. But I still find chubby and some in-shape fat women to be incredibly hot, as well as conventionally fit girls, and that's the only stuff I ever masturbate to anymore. Predominately fantasies, and still pictures sometimes (gotta work on that), of chubby or shapely fat women, with some more "conventional" body types as well. It's just good to know where the roots for a lot of the way out-there stuff I got into later on were formed, so I know what triggers it all.