Wow wow wow! That is pretty much all I can say from the direction of these trends and and the trends at Teens/Sex.  
I guess I never really realized how little parents know about todays teens (but I guess I can't blame you guys....we can be pretty nasty and manipulative :) 
 
Anyways, I'm a seventeen year old girl and from a teen's perspective can I give you a few pointers about how to make sure you daughter (can talk much about guys cuz I'm not one:) doesn't become a teen parent? 
 
- TALK- don't make it hard for your daughter to talk to you about a guy she like or about a her feelings...they say guys can have difficulties trying to control their desire to have sex but have you watched TV lately or read a magazine? Their is so much pressure on girls by the media to look "sexy" and it can be hard for girls not to want to sexually attract guys once they hit their teen years
But even before their teen years you have to talk....I knew when I was eight I wanted to wait to have a boyfriend because my mom would tell me stories about how when she dated as a teen both her and her boyfriend were hurt. Also my mom had me because of an "oops" with her boyfriend and he took of and because of that I didn't have a dad for four years. If you went through this as a parent or if you were a single parent talk to your kids about how it efected your kids (however don't make them feel like they aren't unwanted if they were and accident...my mom was very carefl about this and I've always known that it was hard for my mom to be a single parent but that she still loves me more than anything.) 
 
2. TALK SOME MORE- don't just talk about the physical consequences talk about the emotional consequences. 
 
3. TRUE LOVE- don't let your kids date just to date. Teach them that when you date you are dating to find your future husband...does a thirteen year old really want to get married? Does a thirteen year old want to become like their mom (no offense...buy yeah right!)?-get the picture. 
Teach your daughters that just because you love someone it doesn't mean you love them. 
Teach your daughters that true love is when you care more about the person you are dating more than herself.....If the guy has problems than with drug abuse the girl would not date him if she truly loved him because that is the last thing a drug addicted, hormone raging guy needs. If you make sure your daughter follows these guidelines she won't be dating (with your permission) until she is mature enough. 
 
4. GUYS AREN'T EVIL BUT PROTECT YOURSELF - let your daughters have guy friends...they need to know how to socialize with them and they can be a lot of fun to hang out with. However, remind your teen daughter that guys think about sex A LOT (and if they say they don't they are lying). Tell your daught that if you don't want to be a toy for your boy (and it doesn't necisarrily have to be sex...it can be kissing, making out, holding hands, ect.) then wait until you are old enough so that you know you can say no and that you are sure in youself enough that you realize that a guy's opinion does not define who you are. If a girl is confident in herself she will be confident in what she wants and her boundries and will be able to destinguish between a guy who just wants a girl and a man who wants true love. (I would not repeat what I said above to your daughter...it could be a little harsh...but get that idea across in a loving way) 
 
5. LOVE YOUR DAUGHTER- Your daughter will make mistakes. Be the parent but don't make her feel like a slutt if she kisses a guy. Laugh with her, cry with her, love her. Help her through this time of insecurity and the joys of discoverying her strenghts. Talk about your future son-in-law (imaginary for now of course). Be excited for when the time come when your daughter can date...dating isn't bad...it just needs to be done in the right time. Make a list with you daughter about all the character qualities that she want her husband to have (i.e. responsible, generous, outgoing, funniy, gorgeous, ect. :) Also, have her write letters to her future husband that she can give to him the day before/after they are married. It will be very special to her...but it is like a diary, so parents no peeking without permission! 
 
6. KNOW YOUR DAUGHTERS FRIENDS- Mom exscpecially...be a second mom to your daughters friends...that way your daughter will trust you to bring her friends to YOUR house instead of going to the house of some friend with some parents who you don't know. Also if you know your daughters friends you will know which ones you need have more caution around. One more thing, if your daughters friends trust you they will be more willing to warn you if your daughter is getting into serious trouble. 
 
7. BE MORE THAN A FRIEND BE A PARENT- kids have friends, but every kid needs a parent. Seriously, even if you kid screams "I HATE YOU" and says "WHY CAN"T YOU BE COOL" or "WHY CAN"T YO BE MORE LIKE A FRIEND THAN A STUPID FRIEND" do no give in...I repeat to not give in and bend the rules just out of guilt. Kids aren't stupid. We know your weaknesses and if you always give in when your daughter gives you a guilt trip...well then that's she has to do to get what she wants. I have seen so many of my girl friends do things with guys because their parents did like to say no, but my friends with parents who stick with it have always learned from their mistakes and realize their parents discipine them because they love them.  
 
8. HAVE STRICT RULES- have strict guideline and strict punishments. If you just threaten to punish your daughters for sneaking out of the house but then never punish them they are never going to listne to you and they will actually lose respect for you (honestly, they will just think you are really stupid if all you do is threaten). Love them, and let them know you love them, and don't be mean...but definitly have strict rules. 
 
9. SEX IS NOT EVIL- Teach your kids that sex isn't evil, its not a sin or shameful, but that it has to do with the timing. Personally, I am pro-abstinence, but if you aren't at least tell them to wait until they are older because there is a lot of emotionall ties made when a girl has sex with a guy and teach them to do safely. 
 
10. WHEN TO LET THE CHIKCKEN FLY THE COOP- so when do you let your daughter date? 
It really depends on maturity. DO NOT SET AN AGE LIMIT IN YOUR FAMILY. One child might be ready younger because she is very mature but the other might be saying that as soon as she is "old enough to date" (based on the age limit you set) she having sex. Setting and age limit might work for the first kid but for you wild and rebellious second child it might come back to haunt you. 
One thing that my mom always tells us kid is that we can date whe we are old enough to get married (personally, I think the VERY youngest should be when they start dating is).