Because it just sounds a little bit too devious to me. As said before, if he was that desperate for a handjob from a 10 year old, he could've flown to another country for the weekend and had all he wanted.
It's possible, sure, but it's far-fetched. Even if he's guilty of child molestation, I don't think anyone would go to those lengths.
I'm not comparing the act itself or its acceptance by society... it's definitely bizarre behavior. What I'm saying is that it doesn't necessarily equate to some kind of sexual relationship.
He wants to see himself as some kind of big brother or father figure to these children, and he thinks cuddling up with them in bed is a part of that relationship.