Lox, the 56 were convicted of grooming, trafficking and rape.
That is why they were counted by the Dando Institute survey of On-Street Grooming.
All young men have testosterone. Straw said why he thought it affected BPs differently.
Argue it out with him.

"Keith proposes a slightly different cultural explanation to Straw, Cryer et al."

NO!
Keith proposes no explanation at all.

"Even though the victims said that it wasn't young men?"
I do not remember that Lox.
I suspect you have made it up.
It would be despicable to corrupt the testimony of young rape victims.
Quotes please.