We need an age-gate again...

Okay, let's face it, he's going to probably going to play games that you can't control what he does in, but it's fine that you moderate what you buy for him and play with him.
It's like bringing up a board-game to play on family night, where you roll dice and try to have fun. So, this time you break out the bit nerdier thing, Dungeons and Dragons and all that and you create a pretty graphical world where bad stuff happens to good people etc etc. It'll probably not have a bad effect on him, despite the games rating.
What you don't do, is bring out the ******, lube and strawberries and suggest an intimate affair. That's something he should discover on his own and leave to his own devices.
What I'm trying to say is that as a rolemodel, you are sort of setting the borders on what is alright and acceptable. When he grows older, he can probably identify what is "private material" for himself, but if he's being presented outright porn, extremely graphic violence for sake of violence, then that's going to put the wrong impression on the dude. You don't want your older brother giving you porn, mmkay?
You don't know where it's been, after all.

OswaldCash wrote...
Omg, how can people be such
jerks?? 14 year and you can let him see gore, lol. Mb you also wouldn't
let him have sex with girls?? If not (seriously, if yes - you have
kinda mental problems[smilie]../../../images/forum/emoticons/pinched.png[/smilie]),
then why no to sex in VIDEOGAMES (its like ****ing cartoons man). 14
ain't no 7 zomg, even not 10. "Oh noes, it has blood/boobs/swearing,
it's not for our precious sweety-sweety little boy". He's a young
fella, not a kid, not a *** (damn the forum's filter). And you're
denying him all the fun. You'll end up growing a damn castrate[smilie]../../../images/forum/emoticons/uncertain.png[/smilie].
Comments like this isn't helping and is just violenting several terms of agreement. You're bashing a poster, flaming his control manner, CIRCUMVENTING the swear filter just for the sake of it and trying to act like a moral compass that has north and south skewed. Well done. [smilie]http://i.somethingawful.com/forumsystem/emoticons/emot-golfclap.gif[/smilie]
I suggest the rest of you try to look at it from his point of view, he's not "prohibitng" his brother from access to any content, merely providing content and asking if this is still within his peramiter of appropriate.
As for sex, the legal age is depending on your country and I think only third world countries have the age below 14. It's not a good age to have sex at, nor one where you can appropriately judge the consequences of what you are doing. I should know. <_<