Like many young girls, she really knows how to control an interview with her spunkiness. Johnny Carson seemed as if he could not help flirting with her, even though he seems to try to pass it off as flippancy. Not that he was a MAP, but it can be hard not to find her attractive at any age. Girls have an appeal and allure that all the social norms and moral shaming in the universe cannot fully stifle.
She also admitted a crush on her adult dentist! Nothing unusual in society's eyes there, but we all know that Dr. Smith would have been considered a monster and a perv if he reciprocated that feeling. In a youth-liberated society, maybe Drew would have asked Dr. Smith out, and if he was available, he may have been proud to have dinner with her. And society would not have judged either, since it would be a world where the attractiveness of youth to people of all ages could be admitted as the natural and common phenomenon that it is.