With a simple raise, a small furrow, or a quick lift and hover, eyebrows convey surprise, frustration, shock, and excitement more effectively (and less annoyingly) than an exclamation point on a tweet. But sometimes, eyebrows can send unintended messages: Too much tweezing can lead to bewildered or timid and retreating arches. Wipe away that worried look (if you can). With a little grooming savvy, the main thing your brows will communicate this season is sex appeal.