Blushing is thought to be linked to increased levels of norepinephrine in the brain, which may be associated with romantic feelings. It signals that we are interested and excited, which is attractive to men.
Helen FisherThere were real reasons that you were attracted to somebody originally. The brain doesn't pick willy-nilly. Unless you part ways hating each other for some reason, that mechanism could get triggered again. You can literally fall in love again.
Helen FisherWomen have never been as interesting as they are now. Not at any time on this planet have women been so educated, so interesting, so capable.
Helen Fisher