Final answer:
Men are generally more concerned about sexual infidelity when compared to women, which aligns with certain cultural norms and observable differences in thoughts about sex between genders.
Step-by-step explanation:
Compared to women, men are more concerned about thoughts of sexual infidelity. This is supported by the broader cultural context of sexuality in the United States, where there is a double standard that criticizes women more than men for having multiple sexual partners. Moreover, research by Fisher, Moore, and Pittenger in 2011 suggested that men think about sex an average of 19 times per day compared to 10 times for women, which may contribute to their heightened concern about sexual infidelity.