Examlex
As long as two people have different opportunity costs, each can gain from trade with the other, since trade allows each person to obtain a good at a price lower than his or her opportunity cost.
Multiple Sexual Partners
The practice or behavior of having sexual interactions with more than one individual, distinct from monogamous relationships.
Parental Investment
The time and energy parents expend for their offspring's benefit, including aspects of care, protection, and teaching.
Mating Strategies
Behavioral approaches used by individuals to attract and select partners for reproduction, based on evolutionary biology and social influences.
Evolutionary Perspective
An approach in psychology that analyzes human behavior through the lens of natural selection and adaptation over generations.
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