In most states, minors have always been able to consent.
Tell me how they could ever enter into a contract.
They cannot consent.
In earlier decades they could and would be prosecuted for statutory rape. They are still prosecuted when they trade photos of their nude sex partners.
They still run the risk of pregnancy. They still run the risk of disease. It is still an immoral act.
It is just the will to do anything about it has gone.
And even those above the age of consnet can cavort with those below the age. And even homosexuals can partake despite the liberal hedonists telling us that Lawrence v. Texas was only about consenting ADULTS in private.