Lakshmi signifies beauty. There are two forms of the Goddess - ethereal or transcendental beauty represented by Lalita, and material/worldly beauty by Lakshmi. In India, it is a common practice to refer to beautiful women as “Lakshmi” (e.g., the bride was so beautiful, she looked like Lakshmi).
A longer list of 28 (or 36 or 108) forms of Lakshmi lists a form named Saundarya-Lakshmi, the Goddess of Beauty and Charisma.
Also, Lakshmi is the creator of Cupid (Kamadeva in Hindu lore), the deity of male beauty. It is said that only Lakshmi could create a being beautiful enough to bewitch everyone else. Beauty, sex, love, procreation - all those themes thrive well for those who Lakshmi smiles upon.
So, Lakshmi is associated with Beauty and Charisma in many ways.