Final answer:
The primary influences on early sexual activity include a combination of social and economic factors, religious participation, and subcultural factors.
Step-by-step explanation:
The primary influences on early sexual activity are social and economic factors, religious participation, and subcultural factors. Collectively, these aspects form an intricate network that shapes an individual's sexual behaviors and decisions. Family, education systems, peers, media, and religion are key socializing agents that guide sexual attitudes. As adolescents mature, parental influence remains significant, but they increasingly look to peers and media for information and norms regarding sexuality. Cross-national studies have illustrated variations in sexual norms across different societies, demonstrating that what is considered 'normal' sexual behavior is deeply rooted in societal values and mores.