[Retroman]

Lowering the age wouldn't make any remote difference to anyone...
Besides possibly resulting in more people having sex, especially the one's who stick to the law strictly or are influenced by the legal age.

Lowering for the individual means nothing.
Lowering to fifteen for the nation = more sex = more pregnancies = more abortions = more STD's.

So overall it seems like a negative thing.
People should have sex if and when they feel it is right, and they will usually do so. Im just speaking from the outlook on the laws affect on the country [which is what it's designed for.]