Well, from the start, he appears to make the mistake of 'attraction' being at all sexual, when mostly it will be about role models for future behaviour. Admiration for those older, which will no doubt includes females doing so, is hardly something we would be surprised by, when that is precisely how we learn and mature, by imitating those older. I just find it strange that many would see a sexual element as being at all a major factor here - unless they had a motive to do so. Citing many pro-paedophilic authors will hardly carry any weight, since many will just not believe they have an impartial approach to evidence. "disparaged and dismissed", perhaps for good reason.
"Although it may not be universal, and the level of activity and pursuit no doubt varies among individuals, “Young boys are sexually active from a very early age and will pursue their sexuality whenever they can find an opportunity to do so”
It certainly isn't universal, and many are just not that sexually active until puberty arrives.
"Sex robs children of their innocence, we are told, as though the introduction to the world of sexual gratification is an initiation into a world of guilt and burdensome knowledge which somehow spoils the perfection of childhood."
Or it perhaps just arrives too early such that they are not in a position to be the masters of their futures. With a large proportion seemingly finding such sexual relationships with those older as being negatively perceived, it is still a risk as to the damage likely incurred.
".. this apparent seeking out by boys of older males for sexual mentoring .."
Why would any seek out a homosexual for mentoring of heterosexuality - unless they were homosexuals themselves of course. But it seems many of these 'mentors' don't seem to discriminate between heterosexual or homosexual boys. They are possibly attracted to them regardless and perhaps just see them all as targets for their attention. Many or even most of the children will probably have an existing sexuality, so wouldn't a heterosexual boy seek out a fellow older heterosexual for 'mentorship' rather than have a homosexual 'mentoring' them? That is the question you should ask. And the answer is, of course, it is not about 'mentoring', it is about having access to the young, no matter what their sexuality might be.
The Greek stuff, dropped as a major argument apparently, and the evidence from other culures is pointless since how can one determine the true nature of how the young experienced such matters when it was part of their culture and seen as 'normal'.
"and the Etoro of New Guinea, where a boy who receives semen from an older male does so to “make him grow and strengthen,” and who “is demonstrating his desire to be masculine”
This, like the Sambia (having a belief that semen transfers the seed of life to another male in a similar fashion), is the dumbest evidence I have ever come across when citing such examples. We are supposed to take this as evidence for such relationships being natural? Their ignorance and lack of knowledge is supposed to sway us?
"Ethnographically, in cultures where such interactions are not pathologized, willing participation apparently is nearly 100%."
Well it bloody well would be when it was a normal part of their culture!
".. and to replace them with a model of boyhood psychosexual developmental motivations and behaviors that is built upon honest and unbiased empirical observations, truth, and reality, a genuinely scientific paradigm that accurately reflects, and properly serves, the fundamental qualities and needs of boys."
Which might not include the advances from those with a different sexuality than that which they have themselves, and of recognising the vulnerability of the young, particularly with regards to predators who are usually much more powerful than the young.