This is yet another of the “fix your gay kids” advice books. Lots of “great” advice in watching out for those excessively masculine traits in girls and overly feminine traits in boys. Bad parenting=gay kids because you need to be vigilant in your supervision. You need to slap a doll out of the hand of a boy and/or make those girls wear dresses or the entire civilization is ruined.
The fact that this book exists and that people believe it, it is proof enough that civilization is ruined.
I will be in the back, weeping (again) for humanity,