You're also allowed to write erotic fairytale fan fiction and publish it on the internet.

Just because you're allowed to do something, and by 'allowed' I assume it means, not breaking the laws written down by your local, state, and national legislative bodies, doesn't mean you should do that thing. (And, conversely, there also may be things you aren't technically allowed to do that might sometimes be a good idea to do, although any such actions should be contemplated judiciously).