Why is nasal congestion is like an erection inside your nose? What are the nonsexual health benefits of orgasm? And why, pray tell, are the rats in Dr. Ahmed Shafik's laboratory all wearing polyester pants? From Alfred Kinsey's secret "attic tapes" recorded in the 1940's and 1950's to how present-day Danish pig farmers get their boars in the mood for artificial insemination, Mary Roach covers it all in what is an hilarious romp through the history of the science of sex.
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