a rabbi who is asked whether sex ..is pleasure or work. "If it were work," "my wife would have the maid do it."
Professor Helen Fisher of Rutgers University suspects that low sex drive in women is due to the absence of love.
Lust is associated primarily with testosterone in both men and women ... Romantic love is linked with the natural stimulant dopamine and perhaps norepinephrine and serotonin. And feelings of attachment are produced primarily by the hormones oxytocin and vasopressin, which at elevated levels can actually suppress the circuits for lust.