Pretty Girl Trait by JesseLluvia at Mod The Sims

This trait is a emotional trait, and uses the Active (trait) autonomous actions. Your sim will want to exercise and that’s good, Because your sim will need a high level of fitness skill to unlock most of these buffs. (This trait only works for teens, young adults, and adults.)

Buff that your sim will have:

Your sim will have a permanent +1 confidence buff. This buff has no skill requirements.
For her outfit: Depending on the type of outfit your sim wears, she will earn a different buff (Need high fitness skill)(These buffs will stay while wearing that outfit and will be removed a few seconds after you change your outfit type.).

For activities that she performs: Your sim will have a specific buff when doing some activities (Yoga, Dance, Exercise and Drink from bar)(Some require a high specific skill to work. Like a great Yoga skill to trigger the Yoga buff.). The duration of these buff are from 4 to 6 hours (Sims time).

Random Buff: There are 4 random buff, which you will have depending on your level of fitness skill.
These buffs will give you more confidence and will last 2 to 4 hours and will reappear every 24 hours or so.

Buff that the sims around you will have (Your sim should have a high level of fitness skill for these.):

For your outfit: The sims around you will react to your outfit. And depending on your relationship levels with them it will be a different buff. Strangers will value you especially for your beauty, but your friends will see beyond your beauty and will love you for who you are.

For activities that your sim does: The sims around you will get a buff for some of the activities you do (Yoga, Dance and Exercise).
And these buff will also be affected depending on the level of relationship you have with them.