I'd replace a fixed age of consent with an exam, since some people are a bundle of maturity and repsonsiblity at 12, while others never develop those qualities. After getting your license, there would be a points system; get too many STD's and you lose it and have to resit the exam. People would be required to send notes to their doctor when they're trying for a baby so that unplanned pregnancies can be detected. Sex education would be Norwegian style, but more so; starting early and covering everything from pregancy to STD's to how to make your partner orgasm and the proper care and safe use of toys. It would be tied in with the exam.