Do mosquitoes bite guys more than girls? Which sex is better at diapering babies, remembering birthdays, or hammering nails? Explores the ways in which environment, experience, neurology, physiology, and genetics shape gender behavior in both expected and Author Biography, Bibliography, Full-Color Illustrations, Full-Color Photographs, Further Reading, Index, Online Resources, Photo Captions, Primary Source Quotations, Q & A Section, Quotations, Sidebars, Source Notes, Table of Contents, Websites. (Non-Fiction, Young Adult)