Let's be honest with ourselves, at age 14 we all wanted to have sex, we need to realize our kids are no different so it is on us to educate them and participate in their lives.NO WE ALL didn't, & kids today are WAY different. At 14 my friends & I were not concerned about sex, if any of us really knew much about it to begin with, aside from a pamphlet were were given w/diagrams of anatomy. We were in about 8th grade & that's around the average age girls get their periods for the first time. Female sex hormones aren't active from birth. But that was the 80's, when kids our age did age appropriate things & sex was not thrown in our face by fashion, videos, music, BAD reality TV & internet.
You may not have been concerned personally and put thought into it, and if you're female it was probably a lot different than boys, but by nature our bodies develop for it at that age. Naturally we all "wanted" to have sex, our bodies told us that, whether we did it or not was up to us. But I will speak for ALL males, we wanted to have sex at age 14, whether we found willing partners may be a different story, you know who you are! I kid I kid...
The average female goes through puberty between 10-14 (9-15 in boys) so in the case of a "late bloomer" they may not be as affected.[size=50](http://www.avert.org/puberty-girls.htm)
Teenage sex is certainly not new, nor is teenage preganancy and I grew up in the 80's and I disagree that we did the appropriate things, lol.
The 1990's (age of the internet, reality TV, etc) saw a decline in pregnancy. And all of the things you mentioned are able to be battled by parental involvement. This is a common blame that somehow our society made us worse, but the statistics show the more we discussed it the more we prevented it (see web link below, the 1950's were the highest teen pregnancy rates in recorded history). http://www.guttmacher.org/pubs/tgr/05/1/gr050107.pdf
Key Trends Over Time
Childbearing. The rate of teen childbearing in the United
States has fallen steeply since the late 1950s, from an all
time high of 96 births per 1,000 women aged 15–19 in
1957 to an all time low of 49 in 2000 (see chart).
Birthrates fell steadily throughout the 1960s and 1970s;
they were fairly steady in the early 1980s and then rose
sharply between 1988 and 1991 before declining
throughout the 1990s. In recent years, this downward
trend has occurred among teens of all ages and races.