Remember Passion. As clichéd as it sounds, a marriage that lacks (at least in the beginning) strong romantic feelings lacks stability. But feelings undergo changes, and this is largely due to our nature. In the beginning, we experience romantic passion. Its main signs are the phenomenon of recognition (it seems that you have known the person all your life), the phenomenon of reunion (only next to your beloved you feel harmony and peace) and the phenomenon of necessity (you can hardly bear parting). A person is energetic, positive and these feelings come from the fact that the hormones dopamine, adrenaline and phenylethylamine, which are produced in the brain at the sight of a loved one, enter the blood. But too large a dose of these hormones can harm the body, so nature has made sure that after a year and a half or two years, the passion subsides. Why do we need this stage, why can't we jump right into something calmer? Because, first of all, to create that source from which to draw memories, and secondly, to become firmly attached to each other. And almost all happy married couples are similar in that they have the memory of a romantic and a little bit crazy time of the beginning of the novel.