I am currently playing a female swashbuckler and considering using the new Bluff skill seduce to learn secret use that @Hey I Can Chan suggested to me on this question about special effects suited to a rapier.
The problem is that I currently have a low charisma (10) and the feat states "the nonplayer character must find the swashbuckler physically attractive". I know that physical attractiveness and charisma are not directly linked, there are several questions around there on this topic (e.g., Can Charisma be considered a physical score?), and I am quite on the same line—I don't see why I would have to invest a lot into improving charisma which serves a lot of various purposes when I am only looking for physical attractiveness.
On the other hand I am pretty sure that if I had a high charisma value I could easily play as if I had a great seduction power. So here is my question:
How can I improve my character's physical attractiveness beside improving charisma?