![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | guilt among working fathers, 361, 363-64
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | lifespan, 230, 353
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | mate preferences, 329, 333, 353
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | mating strategies, 347
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | movie stars, 331, 332
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | need of female, 43-44, 366
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | parental investment, 277, 349-51, 365-66
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | runners, 295-96
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | salaries (vs. female), 330-31, 345, 360
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | sex drive, 50n, 334-39, 340
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | strength, 297-98, 299
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | testosterone levels, 248-50, 251-52, 287, 296
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![](/files/02/66/56/f026656/public/2ef551086588a968abff1b9f23537cb8.gif) | Male-female conflict or discrepancies, 17-18, 327, 328, 342
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