When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each — Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
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When these flies were put together in all-male groups they formed long, moving chains resembling conga lines, with each male attempting (unsuccessfully) to mate with the male in front of it.

— Simon LeVay, Gay, Straight, and the Reason Why: The Science of Sexual Orientation
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