I’m gonna say this is a fantasy (because it sounds like you’re making it up and I sincerely hope that you are). Sure, it’s totally fun to think about and imagine what it would be like. Having a fantasy is a very different thing from reality – the two do not often cross over, Most things we fantasize about, we would never actually want in real life, at least not to the same degree.
If you actually did that, it’s called rape, and no, it’s not okay.