I was just thinking that the best way might be to let them see playboy mags or what not but without embarrassing them by giving them, yet still have some control over how much they use them since with the internet they could stumble on some pretty bad stuff.
That led me to think of how I first started seeing that stuff, I found my dad's mags when I was around 13. It took me all of 5 minutes to find them once I thought to look for them. I thought to myself that my dad wasn't very clever hiding them under his bed...now looking back I wonder if he was more clever than I thought, and put them there to be found on purpose.