You can't see "decision-making capabilities" on a person. The point is if someone at that age has the physical attributes of someone much older it is not perverted to find those attributes attractive.This is crap and creepy as well. I cannot imagine looking at an 11 year old that way and any grown man who does is a perv. 11 is a child, they do not have the decision making capabilities of an adult, plus they're easily manipulated. If you need that kind of unfair advantage over a girl then you are truly a loser, not to mention a criminal.
Looking at the situation it would not surprise me if the girl was lying about how things started out. We only have her word that she was coerced into the situation. That would have a lot of relevance in my mind as it concerns the charges and potential sentencing.