That she has a new hairstyle
Women do a remarkable number of things to perfect and maintain their hair
-- cutting, styling, dyeing, curling, straightening, teasing, backcombing, relaxing, etc. -- and they do a lot of it in order to appear attractive to men. Noticing any major change in her hair, whether it’s the style, cut or color, is essential to remaining in her good books. A simple, “Your hair looks great!” will suffice it.