Aging, you don't get how full of self-hatred and terror someone could be, stuck in a body with horrible desires which they can't alter any more than you or I could alter ours? Especially when some of these are due to childhood abuse issues? 
I hope I express this correctly and don't offend too many people, but as someone who was abused as a child myself and ended up in police investigations etc, I still have some sympathy for people with this inclination. It's a horrible one and absolutely not one I'd like to have, so I wish there was a way to fix it for their sake too.
(More sympathy in general though for their victims and I agree that this guy and his wife sound creepy and deluded. I hope his victims and kids are being taken care of during these publicity stunts.)