From a biological perspective, that's perfectly normal and healthy.
Society has imposed the arbitrary number of 18 because they want foids to get educated and they know how hard it is for the roasties to keep their roast beef in their pants.
If society wasn't brainwashing men into thinking that women younger than 18 (but older than 13) are children, those underage teens would be getting pregnant all of the time and the foid education project would have failed very quickly and spectacularly.
Reminder that foid education is one of the most useless wastes of tax money. Firstly, they do not have the drive and disagreeableness to actually get impressive things done. Secondly, most of foids become homemaker anyhow, as it should be, or work in like retail where you do not need general education. Lastly, educated women are much more hypergamous, which contributed to the incel problem which in turn are a massive burden on the economy because they are demotivated, depressed and destructive as fuck