There is an article at Survivorsfirst dot org backslash pedmo dot html. The system is not letting me link to it directly.
That site has an article that discusses the "MO", or way of operating (modus operandi=MO) of adults who seek out younger people for attention. It does not always have to involve physical contact, as the Fr. Dale article mentioned. It's a long article, but worth reading. Adults who have contact with and responsibility for children and teenagers are supposed to act like adults--not like they're teenagers themselves.
If they create "specialness", as the article states, if they behave as though they're teens themselves, then there is cause for concern. They may be in their 30s, 40s, or 50s, but act like teens themselves: prankish behaviors, joking, wrestling, etc. At the same time, they treat the younger person as if he or she were an adult himself. Of course teens love this kind of thing! The profile of this kind of personality is that they are very "popular" with the teens and younger kids. Michael Jackson was popular, too.
These kinds of behaviors enable the adult to gain the trust and friendship of the younger person. Often the would-be molester isn't fully aware of his own inner psychology and drives, and so they appear to the world as a "good person" who's involved in "good causes." (summarizing from the article). They also tend to be very friendly with the teen's family, creating more "trust." The article has a lot more info, these are just some highlights from it.
The article gives a good description of the "profile" of a potentially dangerous personality. Sometimes these men just don't realize what they are doing or why they are doing it, and they think they're doing good for kids. But they don't understand how much it can confuse and damage the kids and teens. Sometimes the abuse is psychological and not physical, but it's still damage. Teens and parents should read this article!
May our Lord protect our children from harm.