Free The Male Brain by Louann Brizendine

Saliva contains molecules from all the glands and organs in the body, so a French kiss serves up our signature flavor. As soon as Ryan's tongue touched Nicole's, information about each other's health and genes was collected and secretly sent to their brains . If Nicole had genes that were too similar to his and the kiss tasted sour, it could have been a sexual deal-breaker. But the kiss was sweet; it led to another and then another. Scientists have learned that there is plenty of bioactive testosterone in men's saliva, enough that it may activate the sexual-arousal center in a woman's brain .
    So your mother was right--French kissing can lead to sex. Ryan was hoping that tonight was the night, but Nicole gently pulled back, thanked him, and said good night without inviting him in.

SCORING AS SOON AS POSSIBLE
    Once Ryan had a taste of Nicole, he was hungry for more. Although he was desperately craving her, he knew he had to wait a few days before calling her, or he'd look too eager. Showing his burning desire wouldn't do him any favors right now, particularly because Nicole was being so cautious . Researchers found that when a man is sexually attracted to a woman, he wants to have sex with her as soon as possible. For the men in the study, waiting a week or more seemed like a very long time. The women, on the other hand, wanted to wait up to three times longer . As much as Ryan was secretly hoping for sooner rather than later, he could tell that Nicole wasn't the type to rush into anything, least of all sex . While that was frustrating on one hand, it was also reassuring and made him think she might be in the long-term mating category.
    In the basest way, to a man, winning the mating game means getting his DNA and genes into the next generation. Even though he isn't consciously thinking this, the instinctual part of his brain knows that the more women he has sex with, the more offspring he's likely to have . Meanwhile, the female brain is trying to discern whether a man has what it takes to be a good protector and provider. Researchers find that this holds true regardless of a woman's level of education or financial independence . When Ryan called and invited Nicole out to dinner and a movie, she suggested that they go Dutch--just to eliminate the pressure for sex she sometimes felt when she let men spend money on her. But Ryan wanted to pony up resources to demonstrate how much he valued her and was willing to invest . In studies of mating behavior in primates, biologists have discovered that females have more sex with males who bring them meat . Primatologists have dubbed this the meat-for-sex principle. The males who showed they were willing to provide food got more sexual access to the females, increasing their chances of paternity. Ryan was on the right track.
    He liked treating Nicole like a queen, and he had no qualms about spending money on her. But by their fourth date he was burning with sexual desire. He thought he'd better come up with something persuasive fast, or he'd die of sexual frustration. Gifts, flowers, or the promise of a romantic getaway weekend--he was thinking of them all. As men well know, they have to develop and refine an array of smooth tactical maneuvers, because women have different mating goals than men have. The female brain wants the hope of love and commitment before having sex, but for men, sex often comes first . Not surprisingly, it was Ryan's philandering teammate Frank who came up with the winning idea. "Take her to our rugby game this weekend, dude. Let her see you in action." Researchers have shown that nothing serves as a better aphrodisiac for women than a show of dominance and strength.
Nicole had never been to a rugby game and was surprised by how rough it was. She loved seeing Ryan steal the ball and take it downfield for the winning point, and Ryan loved knowing she was in the stands watching. She couldn't believe how turned on she was by his sweaty body. After the game, he