Parental investment theory

Parental investment theory suggests that the diversity of reproductive strategies in species stems from the differing investments parents make to ensure their offspring's survival. Since raising offspring often requires time, energy, and resources, parents tend to invest more when their investment directly influences the success of their genetic legacy. This leads to differences in behavior and traits between males and females, often influencing mating choices and competition. In humans, this theory helps explain why, historically and biologically, females may be more selective in mates due to higher reproductive costs, while males might compete more for access to mates.