Shop for Viewer Discretion Advised
These days, adults seem less able to take basic precautions on their own without some kind of warning. On the other hand, saying "don't look!" almost guarantees that people will do exactly that. Might as well use it to your advantage.
Displaying this 'Viewer Discretion Advised' message will make some people heed the warning and turn away, but many more will watch to see what happens next. One way or another, it's bound to make things more interesting.