The drive for sex is a powerful human motivation and healthy men and women throughout history have had a profound respect for it. Sex drive is understood as libido, lust, or the craving for sexual gratification. The drive is associated primarily with androgens (testosterone) and related brain pathways effecting motivation in both sexes.
Male sex drive is stimulated to a greater degree by visual stimuli than the female sex drive. Women are more sexually aroused by romantic words, images, and themes in films and stories. Fisher suggests that the evolutional function of this difference is for the man to find a partner to procreate, so he will size a woman up for youth, health, and her ability to bear a child. Complementarily, women size up a man by her mood integration, feelings, and memory recall. Also, novelty attracts a man by increasing dopamine, which influences sex drive. Pornographers have long understood this. Magazines like Playboy are monthly magazines, not annuals. Internet promoters are constantly changing the variety of sexual stimuli to play on this interest in novelty.
Male sex drive is focused more directly on copulation, whereas the female sex drive is embedded in a wider range of stimuli. Female sexual desire is often a responsive rather than a biological or spontaneous event, greatly influenced by subjective psychological excitement. Male sex drive is more constant, whereas the female sex drive is more variable and flexible but can be more intense.