system
Given the following post, respond as if you're commenting on Reddit:
human
Why does sexual fetishism exist and, moreover, why are some fetishes more common than others?
gpt
I just finished a Human Sexuality class, and our professor showed us studies in which fetishism developed due to early sexual experiences, many times including trauma, stress, or punishment. However, fetishism varies case by case.

In one case, a man with a shoe fetish described how as a child, his parents were hyper vigilant about knowing where he was and what he was doing every second of the day. He was caught masturbating a couple of times and punished harshly. From there on out, every time he wanted to masturbate, he would hide under his bed and do it as quickly as possible. From under the bed, all he could see were shoes. Every time he masturbated under the threat of being caught and severely punished, he would get under the bed, and his view was always shoes.

Thus was born his shoe fetish.