@jeffowski Actually it's uglier:
70% of children born to teen mothers were fathered by men over the age of 20.
https://depts.washington.edu/thmedia/view.cgi?section=familyplanning&page=fastfacts

The mismatch between statutory rape law on paper and in practice is driven by social, cultural, and prosecutorial discretion, not legal theory. (70-39% -> 31% teen moms' daddies are >= 30 yrs old, that's far beyond any Romeo & Juliet exemption. And DNA tests would make proving “sex” trivial even years after the fact.

But hey, that's racist and misogynist USA.