It took a scientific study to demonstrate the phenomenon, but everyone whose heart has beaten at least once to the rhythm of love is well aware that sleep is lost when Cupid’s arrow strikes... So why do people in love sleep less? The reason why people in love sleep less can be found in the maelstrom of physiological and neurological reactions that accompany the euphoria of romantic love:

• production of vasopressin and oxytocin these hormones are associated with a strengthening relationship, vasopressin is also described as the 'male fidelity hormone' and oxytocin creates a mood that is conducive to tenderness and intimacy
• an increase of cortisol cortisol is the 'stress hormone', its presence can be found when a couple is falling in love and is probably linked to the fear they experience of losing their significant other
• higher levels of dopamine sex increases the production of dopamine, the hormone of pleasure and happiness; in this state, the brain is never interested in going to sleep...