I'm prepared to delve into just one of the reasons, although there are others which may have an influence too:
It's because wives kick their husbands out of the family home.
The daughter would normally have a male role model for guidance, but now suddenly experiences a longing for male attention. She becomes confused and seeks attention from horny teenage guys, who of course will be happy to oblige.
Even if she spurns their advances initially, if she wants that male attention, then she will usually be expected to put out.
Some people will disagree with this factor as a reason, but consider this:
Statistically, females have a significantly higher rate of teenage pregnancy when there is no biological father in the home. Don't ask me for links, look it up yourself from independent websites and see.
Feminism is causing our society a great deal of harm!
However since you asked; yes curiosity and attention seeking are two other reasons to pursue sex for a teenage girl.