Advertised as "X-rated and Animated," Fritz the Cat earned an impressive $25 million in 1972. Screenwriter-director Ralph Bakshi based the film on three of Robert Crumb's stories about a superficial college student who tried to seduce anything in a skirt. The gritty, often gross film shocked U.S. audiences accustomed to innocent flirtations and slapstick comedy in cartoons. Thirty years later, …