C., has looked at contraceptive use amongst teen girls and found that those dating men who are 3 to 4 years older are at higher risk of STD and pregnancy than those having sex with boys their own age."Even if the girl would prefer to be using some type of contraceptive, she's less likely to do so if the guy has more power in the relationship," said Jennifer Manlove, a senior research scientist with the organization.Not only are there statistically fewer men, but the dynamic of human engagement, and style of personal connection, has changed dramatically since we were dating in our 20’s.
"From music videos, to porn, to Disney, this is all sits within this bigger cultural context of media images and cultural messages that absolutely eroticize and hyper-sexualize teen girls," she said.
"Based on 29 years of practice," Lee added, "I don't think you could be that mature at 17. Mani Pavuluri, director of the Pediatric Brain Research and Intervention Center and professor of psychiatry at the University of Illinois Chicago, teenage brains are still in the process of developing until age 19 or 20.
Before that, teens' "ability to consider and use judgment is still maturing," Pavuluri said, adding that peer pressure can further impact the impulsiveness of teenagers' choices.
Lee Cohen, a child and adolescent psychiatrist who is based in New York.
"It's probably not healthy, or not the most 'normal' relationship.