Manners will make you fabulous. Good manners are attractive. The well mannered get invited to more dinner parties.
Manners are sexy.
Just like your mother told you. Beyond this basic standard, of course, there are many specific details for a great many situations, but this essence is always the same. In every way, manners are a part of a person's citizenship. Behaving in a thoughtful way is a kind of contribution to the world, both morally and aesthetically. There is a kind of woman who understands this implicitly and we've named her The Fabulous Girl.