Acording to research by Fhionna Moore, PhD, from the University of Dundee, women find low-stress men much more attractive than men with higher levels of cortisol (a stress hormone). Apparently remaining calm is another one of those evolutionary advantages that women are very attracted to. If there’s a saber-toothed tiger attacking your cave, no woman wants a man who is going to freak out and end up fainting from all the excitement.