For me, in fact, this isn't an issue that's specific to pedophilia, but an issue that applies to sexuality in general: i.e. I don't think it would be right for me to even fantasize about having sex with anyone (regardless of whether they be man, woman, or child) that I'm not married to.

I tend to agree. If thinking something about a YF would not be appropriate, then it would probably not be appropriate to think such a thought about somebody else, either. That being said, though I am prone to slip up in my thoughts about people I don't know personally, when it comes to my YF, I am particularly vigilant.

If I ever get to thinking inappropriate thoughts about my YF, I just remember that -- as we are both Christians, and we will likely know each other in heaven one day -- he may eventually know everything I have ever thought about him. When I do slip up, I know I am forgiven, and he will forgive me, too ... but I also know that I can't live a double life. If he does eventually get to see my hidden thoughts, I want him to be able to say that, despite my various failings and weaknesses, that I "did right by him".

Blessings,
Rainboy