Promiscuity
Evolution

Evolutionary psychologists propose that a conditional human tendency for promiscuity is inherited from hunter-gatherer ancestors. Promiscuity increases the likelihood of having children, thus "evolutionary" fitness. According to them, female promiscuity is advantageous in that it allows females to choose fathers for their children who have better genes than their mates, to ensure better care for their offspring, have more children, and as a form of fertility insurance. Male promiscuity was likely advantageous because it allowed males to father more children.
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