This classic example of a female face shows clearly how losing weight, including in your face, makes your more attractive. This applies both to men and women – a flatter or less “bloated” face means a more defined facial structure. Women find a thinner face particularly attractive men. Often, a woman who says that she is attracted to a guy because he looks “masculine” is actually attracted to his well defined facial features. Daniel Craig is one typical example of that kind of face.
As obsessed as some girls might be with losing weight and being thin, losing weight and being fit flatters to men just as to women. Some call it being superficial; I call it being human and following our human nature.