Fortunately, lawmakers in New York took teenage relationships into account.
In New York State, a person who is under age 16 but older than 13 years old can consent to sex with a person who is no more than 4 years older; the crime of the 3rd degree rape only happens when a person over the age of 21 has sex with a person who is under seventeen years old or younger and that person can or may be punished with up to 4 years in prison.
Also under the terms of COPPA, the FTC-designated "safe harbor" provision is designed to encourage increased industry self-regulation.
Charges resulting from a breach of these laws may range from a misdemeanor such as corruption of a minor, to what is popularly called statutory rape (which is considered equivalent to rape, both in severity and sentencing).
There are many "grey areas" in this area of law, some regarding unspecific and untried legislation, others brought about by debates regarding changing societal attitudes, and others due to conflicts between federal and state laws.
Before then, they also have rights that can be enforced.
Lawstuff This website provides information about child laws throughout Australia.