"To find out why people have sex, Curt Lively trawls a New Zealand lake for mud snails. Mayte Parada puts volunteers in an MRI scanner and turns on the porn. Andrea Ganna searches the genomes of half a million Brits. Almond-scented rats, Genghis Khan's family tree, Pornhub statistics-it's all in a day's work for sex researchers. This book introduces readers to sex researchers and explains the questions they are asking and the methods they are using...

"When Casey Parks came out as a lesbian in college back in 2002, she assumed her life in the rural South was over. Her mother shunned her, and her pastor asked God to kill her. But then Parks' grandmother, a stern conservative who grew up picking cotton, shared a story about her childhood friend, Roy Hudgins, a musician who was allegedly kidnapped as a baby and was "a woman who lived as a man." "Find out what happened to Roy," Casey's grandma implored....

In this video adaptation of her bestselling book, pioneering feminist blogger Jessica Valenti trains her sights on "the virginity movement" -- an unholy alliance of evangelical Christians, right-wing politicians, and conservative policy intellectuals who have been exploiting irrational fears about women's sexuality to roll back women's rights. From dad-and-daughter "purity balls," taxpayer-funded abstinence-only curricula, and political attacks on...