25 as age of consent?! They gotta be kidding. By that age, some of my girlfriends and I were handling either grad school+PT job+a toddler in tow, or, full time jobs with kindergarten age children in tow, and some of use were single mothers, although we had help from our families. Our children ("our" means belonging to my girlfriends or me) have already finished universities or are studying at universities.

As for brain wiring, since the idea that brain cells do not regenerate appears to have been disproven, and instead we know now that brain continues to change and be malleable throughout life, what is the point of talking about when maturation ends?

Biologically, some of the processes of aging begin right at birth. It does not make newborns fit for marriage. The reverse is also true - even if some growth processes have not yet stopped, it does not mean that a person is not fit for making dating decisions by herself.