Sex

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  • Red line Student estimates; blue line real
  • Sex

    1. 2. Sex
    2. 3. Asymmetries Between Males and Females <ul><li>Differential Parental Investment (Trivers) </li></ul><ul><li>Uncertainty of Paternity </li></ul><ul><li>Age and fertility </li></ul><ul><li>Sex Drive and Orgasm </li></ul>
    3. 4. Prevalence of Typed of Marriage
    4. 5. Mate Preferences <ul><li>Males Prefer Younger Females </li></ul><ul><li>Virginity at Marriage Never More Desirable in Males </li></ul><ul><li>Females Prefer Successful Males </li></ul><ul><li>Males Have Higher Sex-Drive </li></ul><ul><li>Male Orgasm More Reliable During Intercourse </li></ul><ul><li>Males More Interested in Variety </li></ul>
    5. 6. Male and Female Attitudes Toward Casual Sex
    6. 7. Jealousy <ul><li>Males and Females Both Experience Jealousy </li></ul><ul><li>Do We Differ in What Exactly Provokes Most? </li></ul>
    7. 8. Gender and Jealousy: Typical Undergraduate Data 80% 47% Emotion Worse 20% 53% Sex Worse Females Males
    8. 9. Gender and Jealousy: Penn Data 91% 62% Emotion Worse 9% 38% Sex Worse Females Males
    9. 10. Gender and Jealousy: Non-Student Data (Percentage finding emotion worse than sex) 68% 29% 74% 68% FEMALE 66% 34% 67% 66% MALE AFFECT REL. ANGRY HURT UPSET
    10. 11. Sperm Wars? <ul><li>Types of Sperm? </li></ul><ul><li>Responsive to Mating Choices? </li></ul><ul><li>Mechanism? </li></ul>
    11. 12. Problems for Evolutionary View <ul><li>Homosexuality </li></ul><ul><li>Female Orgasm </li></ul><ul><li>Too Much Sex </li></ul><ul><li>Concealed Fertility </li></ul><ul><li>Achieving Women </li></ul>
    12. 13. Exotic Becomes Erotic? 60% 40% 42% 13% Most Childhood Friends Opposite Sex 80% 24% 56% 8% Atypical Sex-Type 81% 61% 48% 11% Did Enjoy Sex Atypical Play 63% 15% 63% 10% Not Enjoy Sex Typical Play Lesbian Hetero. Gay Hetero Females Females Males Males
    13. 14. Female fertility as a Function of Age: Real and Imagined   Bivariate Fit of fertility By age
    14. 15. Sexual Revolution: Attitudes Toward Sexually Experienced
    15. 16. Sexual Revolution: Behavior
    16. 17. Possible Causes of the Sexual Revolution 1 <ul><li>1943 Invention of Penicillin </li></ul>
    17. 18. Possible causes of the Sexual Revolution 2 <ul><li>1943 Invention of Penicillin </li></ul><ul><li>1960 Invention of Birth Control Pill and IUD </li></ul>
    18. 19. Possible Causes of the Sexual Revolution 3 <ul><li>1943 Invention of Penicillin </li></ul><ul><li>1960 Invention of Birth Control Pill and IUD </li></ul><ul><li>1945 Beginning of Baby Boom </li></ul>
    19. 20. Possible Causes of the Sexual Revolution 4 <ul><li>1943 Invention of Penicillin </li></ul><ul><li>1960 Invention of Birth Control Pill and IUD </li></ul><ul><li>1945 Beginning of Baby Boom </li></ul><ul><li>1964 Too Many Women </li></ul>
    20. 21. Possible Causes of the Sexual Revolution 5

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