He is a he, started VERY young, and is still pretty inexperienced in live. Reason? Pretty simple, I'm 40, and I'm telling you, not a single adult makes any remote sense, every single adult in this novel is disfunctional to an extend. We do not think like that, we do not act like that, we do not react like that. He clearly has absolutely no clue of how adult world works.
His avatar is Dylan or Sam, that is how he looked like when he started the novel.
A 35yo woman going to a club with a 16yo guy? come on! Do you realise how ridiculous that actually looks like? It's embarrasing for her!
A 35ish yo woman enjoying a 15yo rock concert? do you know how lame those events are? do you know how bad that sounds?
I could tell you 30 reasons why he is clearly below 25, and if he is over 25, he is handicapped by some means.
Anyways, this is a fantasy, just try to have fun, but realism and maturity are far far far gone.