"Family" background
I grew up with my mom, her 2nd husband, a half sibling, and 2 or 3 step siblings. None of the kids were fully related to each other. The "adults" both have neurotic personalities, and they created an environment of constant acrimonious fighting and cold enmity. They took out their frustration, anger and resentment on the kids by picking fights with them, naming them in their own conflicts, and behaving with animosity to them. I spent as little time as possible outside my room but her 2nd husband would still come and pick fights with me there, usually either when mom wasnt home or while they were fighting. I thought her 2nd husband was an irrational, volatile moron (lol) so i always fought back.
Adult motivations
My mom and dad divorced after i was born, they were just fvcking without protection or planning afaik. My mom's reasons to date my dad seem to have been that "it was trendy" to date guys like him, that "she was infatuated", that "when he didnt validate her and said she doesnt understand that god will always come before her, it was an astonishing hit to her ego and made her want his validation", and that she wanted to "tame the wild man". Everyone else said it was a bad idea to date him, but she didnt listen. Ive never asked my dad why they got together. I have tried to figure out why my mom got together with her 2nd husband, but in her own words she "has no good answer" to that; unlike my dad, she didnt even like him when they met.
Conclusion
Ever since i realised women will be with and have kids with men for infantile reasons, or for no good reasons whatsoever even to their own dysfunctional minds, i have been terrified.