Red is the traditional color of arousal. And there's nothing more classic and flirty than a bold swath of blood-red on your lips.
No matter what shade of red you choose, you're making the statement that you possess the superpowers of a seductress, with the added advantage of being an enigmatic woman. Accenting your pout with such a meaningful color will take your game to the next level, but you should first consider consulting a pro. It's important to complement the the shade of your skin.