I had a mother incest fetish for a while.
I say had because I think I cured it with a good dose of imagination and really satisfying masturbation. I guess to a major extent there was a hole in my soul from basically being neglected by my mother from the time I was a baby. After a few weeks in the hospital post birth she only held me 'when she could' but she was working. So it was very few and far between, and never on the terms that I needed. Babies tend to cry out because they literally can't regulate their own nervous systems, and need their mothers to.
But from infancy she was always working or sleeping (night shift), so she'd sometimes be present but not be accessible. I think it fucked up a part of me that has to do with intimacy because now I literally get nothing in my soul from girls. To a major extent, if a girl likes me I tend to get like, disgusted, or off put. This isn't to say that I can't love. I was married for a while to a chick that frankly didn't exactly love me the way I thought I needed, but I did everything I could for the marriage because I loved her. I just never felt loved by her even when she was trying, or holding me.
Anyway. Looking at porn since 13. Found Literotica and the taboo/incest category and never had more intense masturbation seshes from that, specifically mother/son, it just checked every box and I shot fucking ropes to these fictional mothers who were accessible in ways beyond the normal, mostly having to do with fantasies of breaking down the barriers to the taboo, seduction, etc. Never desired my own family, but the porn did it for me unlike anything else.
But after enough of it (and a smidge of self work to figure out how to self soothe) I suddenly am no longer into mother/son incest. It's like I fixed the issue, it's resolved for me.
What this tells me is that my fetish was very clearly the result of a parent wound that could only be healed by having myself feel compensated and cared for in my imagination. P wild.