How does love arise? What makes two people who did not know each other yesterday decide today that they should spend their lives together? Why do spouses who have long lost mutual interest look for entertainment on the side, but do not want to get a divorce? Where does a young mother get the strength to stay awake all night, cradling her baby? Why are some people attracted to members of the same sex?.. At all times, poets and artists have sung the magic of love, which can make a person happy or make a person suffer. But only relatively recently have neuroscientists become closely interested in the question: what happens to our physiology when we are in love? What chemical processes are “responsible” for our love madness? The research results, which amazed the scientists themselves, will undoubtedly not leave the reader indifferent.