We like to think that we are living in the most sexually liberal period in history, but we're actually about to discover that sexual attitudes have changed more in the last century than any other. Dan finds out how sex was used to motivate the troops during WWII through the use of saucy cartoons.Amanda and Dan both dress up as some of the biggest sexual icons of the century, Marilyn Monroe and Elvis Presley. Amanda also learns how sex changed for women with the advent of the birth control pill before finding out what got Brits swinging in the 1970s.