K.L.
I wouldn't make assumptions about what the boy might be exposed to. My son spent the night with a family in our neighborhood when he was 11 y/o. He had spent the night with that friend on other occassions without a problem, but this time he came home asking me about the name of a sexual toy. It turned out that his friend's older cousin had also spent the night and had snuck in an 'adult' video, which he shared with the boys after the parents were asleep. Apparently, he had gotten the video from a friend who was old enough to rent it. All it takes is one 18 y/o sharing something with a 16 y/o, who then shares it with a 13 y/o, etc. If the older adults are going to create these things, it is almost impossible to keep it away from our children. Where is there a school that is safe? I homeschooled my son and he still got exposed via a family I could trust.
In this ultra-free society we have created, we have lost the freedom to allow our children a healthy social climate in which they can grow up. We haven't seemed to catch on to the reality that complete liberty is just anarchy. So, when we protect freedom of speech and freedom of the media without any limits, our children are doomed to suffer from the tyrany of the media. It just isn't possible for everything to be free. Our young women are free to join the armed forces and be exposed to the horrors of war, but their future children are not free to develop inside a mother's body that is free from the nightmares of post traumatic stress disorders. We have a military that is sending mothers of pre-school aged children overseas and into combat zones. What freedoms have we chosen to protect?
If you are free to smoke wherever you wish, I am not free to avoid smoke wherever I wish. If you are free to get a flu vaccine which introduces unnaturally mutated viral contageons into the air around you, I am not free to avoid being exposed to those contageons which I understand to be unsafe in public places. If my neighbors are free to buy pornography and throw it out with the trash that the wind or a dog might knock over, our children are not free from being exposed to pornography on their way to catch their school bus.
We have to grow up and realize that we must consider these things intelligently. We must come together and decide which freedoms we wish to protect from other freedoms.
All that said, and thank you for letting me get these thoughts out there, I agree with a previous response that it is up to you to make sure your child feels secure enough to talk to you about all of this. At some point it is better to have them fully informed so they will be confident in how to handle themselves when certain subjects come up. At the age of 5, it is fine to simply answer the questions they are asking. At age 10, it is too dangerous for them to not know enough to prevent them from being tempted by curiosity to try things out and use words they don't really understand because they hear others use them on the playground. The more mysterious you keep the topic, the more curious children that age become. Don't underestimate a 10 y/o's ability to understand if they are given a chance. Make sure to ask your daughter questions as you explore this topic so you are sure about what she does understand or where she might be confused. Often, the way the topic is presented at school leaves children quite confused.
Today, I think we not only have to make sure they understand their own bodies, I think they need to understand that there is a lot of confusion and immaturity about the subject and that many people treat our reporductive organs as if they were toys that are simply played with for entertainment without regard for how it can change a person mentally and emotionally as well as how it can change their future and the lives of their friends and families. It is important to help a child find a comfortable area of dignity that is neither prudish nor crass. We need to help our children develop a real sensitivity so they can handle the subject with confidence, honor, dignity, and self respect. It isn't just about birth control and disease prevention. Today it is also about how easy it is to put your own nude image on a computer and how easy it is for people to download that picture and how once you do that there is no way to know whether or not your future children and grandchildren might find that picture floating around in cyber space or whether the pervert around the corner is thinking about you night and day because he recognized that picture. There are some things we really need to respect. A 10 y/o can grab your digital camera or cell phone, take a picture, put it on the web, delete it from your camera, and get on to some other activity while you are pulling weeds in your garden or talking to a neighbor.
No doubt, Family Guy and The Simpsons are crass, but that isn't even the whole tip of this iceberg! This is a reality about which we cannot afford to remain ignorant or leave our children ignorant. It is likely that most 12 y/os know more about what is going on than their parents do. If we keep our heads in the sand on this subject, who will protect our kids?