You're once again relying on the fact that someone won't find out in order for you to feel that you've gotten away with it. That's not a moral act, that's an immoral act that has gone by unnoticed.

Maybe you're not hurt by me jerking it to you but you'd be hurt by another violation of your identity like me impersonating you to call your mother names and hurt her feelings. Those are both violations of you, and they're ways of using you as a means to a selfish end.

Philosophical moral frameworks which people tend to follow include the idea that human beings shouldn't be used as a means to an end.

We can tweak your example to one where the simulation is of someone that doesn't exist and there'd be even less to call into question, but maybe at that point you feel you wouldn't get the same thrill... That thrill is a sign that you're being immoral.

You're probably young and will hopefully continue to develop mentally and emotionally and will learn empathy, but your views here are problematic.