This wholesome book teaches children two important truths:
(1) All mammals - including humans - are either male or female.
(2) Mammals do not change sex (gender).
The basic differences between girls/women and boys/men and other male and female mammals are factually explained through short passages that are ingeniously authenticated by vivid photographs.
The featured stars include cattle, dogs, pigs, horses, big cats (lions), bears, cats, bonobos and - of course - humans