Duke Nukem 3D, when I was 7. Oh that was a time of innocence. My parents turned on the adult mode when I asked why the girls were in the underwear. Note to mention the whole "I don't have time to play with myself" went right over my head, as I was trying to convince my parents there was nothing wrong with that, because he was standing in front of a game with him on it. "He's talking about the game when he means himself, it's funny!"
The worst part is my friends were more sheltered than me. Then again I always asked questions I shouldn't.