It's Perfectly Normal: A Book about Changing Bodies, Growing Up, Sex, and Sexual Health by Robie H. Harris
Barcode A 1922 it won't let me enter it for some reason.
This is the cinema veritè story of five irrepressible but troubled boys pulled from the train wreck of foster care and the two articulate men who are now their fathers, and their moving metamorphosis into a solid family unit.