She believes she can be sexy by simply making a face or moving in a certain way.
Exactly that – just another naive young woman who doesn't know how to be sexy, but equates it with something purely physical involving flaunting her body. Great show-woman though: she knows how to get reactions.
The best age for women is, in my opinion, between 28 and 35. They are not only physically hot, but they know what they want, they are more confident and they just ooze sexiness.