"However, young teen relationships with adults have a strong tendency to involve coercion or misrepresentation and end badly a high percentage of the time."

???

Where did you get that nonsense?

Quoting a recent post by kratt   598462.htm  :

"155 US-girls 14- to 18 years old were asked about their age and about the age of their sexual partner (those were 14 to 33 years old). The girls also got 12 questions about "Relationship Control" (e.g., “Most of the time, we do what my partner wants to do”) and 7 questions about "Decision-Making Dominance" (e.g., “Who usually has more say about whose friends to go out with?”). One of the results: There was neither a significant correlation between the Partner age difference and "Relationship Control" (0,071) nor a significant correlation between Partner age difference and "Decision-Making Dominance" (-0,006)."

Source here