This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
It shouldn’t need explaining, though.
It’s basic common knowledge that anyone with the slightest interest in not being ignorant should have been familiar with by the time they finished general education.
(You don’t need to have watched or read the play, mind, that might be out of your control depending on its availability in your context, but there’s no excuse for not knowing it exists and what it’s about.)