My son is 15 now, so I basically relaxed censorship on everything except for sex/nudity. I'm pretty sure that he has some access to porn and whatnot, but he's going to have to work for it...like I did.
Musically, and with comedy I made sure, when he was younger, that I listened to radio edits, G/PG rated movies, TV...etc. I didn't even curse around him until I was comfortable that he was mature enough not to repeat it...like 10.