It's just lines of code on a screen; no actual conscious entity got hurt in the process. You said you would never do this to a person in real life, so you should be fine; no need to feel bad about yourself. Everyone has fetishes. Some are just weirder than others. For example, I've been generating thousands of AI-slop images of Chainsaw Man girls with impossibly large asses. I'm deeply ashamed of it, but at the end of the day, it's just porn images on a screen, and no one will ever find out.