Regardless, the "keeping his age" thing has a practical purpose: I'll have him go around apologizing for his behavior later on (and I also figured out a way to prevent damage to the reputations of the girls), and I'd really not like to write an eight-year-old apologizing to women for posting their dirty pictures online... >.>
Another thing occurred to me - save for deduction, Julian had little way of surmising Lucas knows who is Ricky or where he lives.