@green-archer please read this all Not theory , just science , and technically it is just a chemical reaction , its a proccess in your mind , Testosterone and Estradiol will flood your whole brain and will generate a feeling that you need to be with someone but without a specific person which activates our need to multiply , the stage 1 of love begins when you meet an acceptable partner this is where adrenaline , serotonin and domapine comes in the work inside our brain now whenever you see your partner your heart gets an ammount of Adrenaline which causes your heart to beat faster and you start sweating and sweat is really important here because it has pheromones in it , and you shouldnt get rid of the sweat infact try sweating as much as you can near your love , now when you get in relationship with your partner the Dopamine inside your brain is released and you are left with less dopamine so its easier for you to be happy that generates the feeling that world is more beautiful and these reactions sometimes stop and you break up , or it is here till you die