One of my mates I've talked about before on here is strawberry floating weird like this.
He was in year 10, and got talking to this girl in year strawberry floating 6 (so 10/11). How he came about that I don't know, I certainly don't know little girls outside of family. Maybe he lured her with sweets at the playground gates? Anyway he got talking to her (what did he talk about with her, strawberry floating last nights Newsround?) and a year later when she was in year 7 (so 11/12) he got with her.
Kept it from everyone, seriously he didn't tell a soul. However people noticed, I noticed, it was god damn odd. Then the police got involved, asked both sets of parents if they knew what was going on, they must have, since nothing came of that. That was that really, the banter at the pub or at someones house between the rest of us when he wasn't there was (and still is) strawberry floating fantastic

We all felt it was disgusting, but the couple of times anyone mentioned it, he went quiet, and sometimes cut contact with those people for a while. It was the under aged elephant in the room.
Then he got drunk on holiday and one of my mates got out of him that he played cricket on (her undeveloped wicket) at 13. Yeah. And plenty of times since. Give him his dues, he's 21 now, and still with her at 16. Probably going to downgrade soon to a younger model? Why we didn't tell the police I don't know.
Best of it is, there's a chance he wants to go into teaching!