There 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 FisherBoth sexes like the exercise and challenge of sports, but for men it's also a basic display behavior for impressing and winning a mate.
Helen FisherYou can really get poked in the back and not feel it very much, but just a feather around your lips and you really do feel it.
Helen FisherToday, American women bear an average of 2.2 children that live to adulthood. Across most of Europe, women bear even fewer young.
Helen Fisher