In both the professional and popular literature most of the words or phrases used to "name " our topic are either too narrow, ambiguous from variations in usage, or overly laden with emotional connotation. The answer, I think, is shorthand, so I'm going to coin "intergen" as the referent that I'll use. Other terms from the literature, then, can be used with more precision, or not used at all, as needed.
"Intergenerational Intimacy" is a term I seem to have introduced to the professional literature in two papers presented at conferences in 1987 (including the Summer symposium in Jemez Springs, New Mexico), and in my article in the Journal of Homosexuality, Vol. 20 Nos.1/2, 1990. When that special issue of the Journal was issued in book form, the term became the title, Male Intergenerational Intimacy (New York: Haworth Press, 1991). Whether or not I was the first to use it, the term probably comes the closest to performing the dual purpose of being positive and of describing adequately the parameters of the issue. Still, the word "intimacy" is somewhat ambiguous, and the term itself is a bit long (eleven syllables!) to be a "nickname" that is used over and over in discussions. Also, there are even variations of this term that avoid the ambiguity of "intimacy" by substitution, such as "intergenerational interaction", or "intergenerational relationship".
"Pedophilia" is a narrow medical term, also used (and often misused) by the child-abuse-industry (CAI) and the general public with decidedly negative connotations. "Pederasty" is probably a more accurate reference, though it is often assumed to refer only to sexual interactions, and that would be the wrong focus here.
"Boylove" would have been my choice if we had to use an existing word. Some will have an automatic negative reaction, perhaps in part due to a similar-sounding combination in the full name of the organization known as NAMBLA -- the North American Man/Boy Love Assocation -- which gets a lot of negative press. On the other hand, it is difficult to fault the word "Love", or the complex of emotions it describes, when the word is used properly. This term has the added benefit of a subtle double-meaning: Love for boys, and love that boys themselves express towards others.
CAI will be used when needed as an abbreviation for The Child-Abuse-Industry, a massive force in American society today made up of social workers, law enforcement, psychologists, researchers and pseudo-researchers, prosecutors and legislators. Their primary activity is guaranteeing their own jobs and building their reputations. They do this by maintaining thresholds of fear through skillful manipulation of the media, by promoting questionable research that reaches the conclusions they want, and by pushing countless new laws that no legislator has the backbone to vote against no matter how ill-advised or pointless the laws might be.
Not all advocates for children or adolescents are part of the Child-Abuse-Industry and make no mistake -- abuse, molestation, rape and other crimes are committed against children and must be punished and prevented when possible. There are lots of quiet, hard-working people in communities and service organizations, in schools and hospitals and detention facilities who know and respect real kids and do their best to give them a chance. They are not nearly as visible and noisy, and they get small results that actually make a difference. Those who are stuck in the CAI are only visible and noisy, and their results are usually "more of the same".