Erm...I don't want to get too far into this, but a significant portion of the female population reaches sexual maturity at or before age 9... that is true today and I assume it was true then, as well.
From what i've been told, in the Arab peninsula, where the weather is much hotter, girls get their period earlier than girls in Europe.
Btw, even though, as stated many times here already, there were perfectly valid reasons to have sex with 9, 10, 11, 12 year old girls, I still find imagining our predecessors, some of them even in their 50s or 60s (who didn't brush their teeth for ages and didn't wash themselves for weeks), having sex with girls of that age incredibly annoying
