Obviously, the grooming and manipulation and seduction involved suggests a level of calculated premeditation. Yet I'm not sure I buy the "evil mastermind" image that conjures up. Are the people who have these urges also born with their own mental handbook 'How to Seduce a Child'?
People's actions always have premeditation in them, but not in the simplistic "now I set out to do this" mode. When I have talked to people who fell in love later in life than early 20s, they usually report that while they did not start desperately going "now I need to find a partner for my life" they had, sometimes gradually and sometimes more rapidly, changed their mindset about the issue and opened themselves up to the possibility both mentally and emotionally. I think those who engage in transgressive acts first start tearing down the boundaries around these acts--or in the case of a repeated pattern and cycle of the abused becoming a future abuser, have them taken down. But the footwork is there, I believe.
Of course, adulthood is a very fluid concept--I find strict definitions (statutory rape three months before someone's birthday, accepted a day after) ridiculous. I remember myself very well when I was a 12-year old boy, and if someone I found sexy had approached me then, it absolutely would not have been abuse or manipulation. But that's because I know what my own state of mind was. If somebody had approached me, would he be deemed sick? Judging in general, I'd say yes. Speaking of my particular case, and assuming I had let him known I was open to that, I'd say no. But what 12 year old is so bold?
Yet the problem with MJ is that he was an out of this world mega icon approaching these children (and their families) in a completely different context: enter my universe of music, and Neverland, and theme park on the premises, and the whole world adoring me. Even if there was no sexual abuse, I don't know how that could ever be a real child-adult friendship because the adult was not real: he was a projection of multiple apparatus.