Which theory helps to explain the sex difference in willingness to engage in sex on a first date, as illustrated in this example?

Question

Quizplus · Accepted Answer

The parental investment theory suggests that because women have a greater investment in reproduction (pregnancy, childbirth, and nursing), they are more cautious than men when it comes to engaging in sexual activities. Therefore, this theory helps to explain the sex difference in willingness to engage in sex on a first date.

Which Theory Helps to Explain the Sex Difference in Willingness