Women become horny for sex with men at 8 or 9, and become very horny for sex with men at 11 or 12. But men often miss on the former stage (8-9) of female horniness, and only notice the latter stage of it (11-12), because by the latter stage the women have developed the SSC needed to attract most men. (and are also hornier than at the earlier stage)

And the AOC in Delaware in 1880 was 7, because “adulthood” or lack thereof have to do with whether or not what one should have sex. This idea that sex must necessarily be tied to “adulthood” is a very modern idea, and the very sharp distinction that people in the modern age make between “children” and “adults” is traced back to the Enlightenment period; before that, the issue of child/adult was much less prominent in the public mind, as people viewed other categories — not age, which is an arbitrary notion — as really important.