Of course I am posting too late, but for those who have these talks coming up with your sons,
For my kids 9th birthday party, he wanted a campout with some friends, so we held a backyard campout and 3 of his friends, we put all of the kids in one tent, and me and wifey in another tent next door. After the campfire and smores, time for the sleeping bags, so got the kid's teeth brushed and off into their tent. Of course boys being boys, they talk in their tent and we're in our tent listening.... They talked for a while and talk about trading cards, sports, and then the conversation turned to girls.
oh my that was an interesting conversation to listen to, amid giggling and boasting, the kids were racking and stacking the girls in their school and what order they liked them, etc who was good looking and who needed to wear a bag over her head (ouch)... One kid boasted of going out on dates with one particular girl (I highly doubt it - i.e. their families eat dinner together regularly)
So after the party, I figured it was time to sit down and have a talk with him.
I approached it as these are the natural changes that are going to be happening with his body. He's going to start growing facial hair, his voice will deepen, he already knew the names of all of his private parts. I explained he'll be growing up to be a man, and he'll be able to be a dad one day, and part of that includes his body getting ready to have kids. I explained he'll have erections - explained it's when the penis gets erect - I mentioned that he probably has erections now. They're normal
I explained his body - his testicles will start to make sperm, When your body make it, it has to go somewhere, I did explain that the sperm either comes out when you're sleeping (not technically correct - the body absorbs it - what comes out is semen which carries the sperm) - then explained wet dreams - that it's normal - it's like you pee'd in the bed but it's sticky - (making stick'um) - just like you peed in the bed, you get up and clean up (what he should really do)or if you're lazy you just go back to sleep and you'll have crusties in the morning (not the preferred option) or you can make it come out your self - it's called masturbating, and it's okay, but it's a private thing but everyone does it. I didn't explain the mechanics of how to masturbate... just that it has a name.
Then he asked about what happens to girls I explained broad brush things, but I told him he needed to ask mom if he wanted more details.
Finished up by telling him that he and his friends will probably talk about this at some point, and sometimes other kids might have the wrong ideas, but that he could always come to me and ask if he wanted to know the truth
He seemed to accept what I told him.
So fast foward a few weeks later, and we are camping in our Scout group, and after lights out and the Scouts are in their tents, There's my kid, talking to the other kids in their tent and holding a sex ed class about boys and girls growing up - all the talk between the Scouts went quiet and the only one talking is my kid... to which all the other parents can hear, and I'm looking for a fox hole to go hide in.