Cartoon women are inherently difficult subjects for the animator for the reason that animation demands caricature and comedy, which are concepts inconsistent with femininity, grace and sensuality. The result is that when animators create female leads, they tend to de-emphasize cartoon qualities and accentuate realistic mannerisms and behaviors.
There was a brief moment in animation history when funny and sexy female characters were encouraged though, and that era coincided roughly with World War II. Some historians, like John Costello, have argued that the war represented the true beginnings of the sexual revolution in the United States. During the early-1940s, sexual imagery gained new visibility and cultural acceptance. Young soldiers lusted after Betty Grable and Rita Hayworth pin-ups, while reading Milton Caniff’s comic Male Call and decorating their bombers with provocative nose art. Within this liberal environment, Hollywood directors and animators took advantage of the opportunity to explore creative new ways of portraying the female character in animation.