KFC put together a list for one of his readers who is making a list of shit to tell his kid. Two most important things: Don't drive drunk, and use a rubber. Everything after that is cream cheese.
I really don't know what to tell a 6 year old though. Certainly nothing about condoms and booze. I'd probably tell him to learn other languages, learn how to fight, and learn to play the guitar. He won't understand it then, but all that shit will pay dividends in pussy and confidence when he's older, and a 6 year old's brain elasticity is such that that's the time to learn how to do that stuff. Once you start drinking you can throw neuroelasticity out the window. You're as good as you're gonna get pal.