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what if early humans/cavemen learned to have sex without thrusting?
Quote from: the5thforcewhat if early humans/cavemen learned to have sex without thrusting?The evolutionary biologists among us suggest that thrusting is effective at flushing out any semen from previous matings (this is ...sorry, you cannot view external links. To see them, please
REGISTER or LOGIN).They suggest that it is a hard-wired instinct for a male to improve his odds of fathering a child.The thrusting instinct stops at ejaculation.