Japanimation or Anime might well be the definitive form of adult-themed animation.  There is a very informative introduction for neophytes to the genre which will help explain the aesthetics of many of the techniques used.  The tape is comprised of four short vignettes, each of which expand upon the sexual exploits of Dr. Ogenki and his sexy nurse Ruko Tatase.  Together they help to cure sexual deviants who are in dire need of sexual therapy. They effect a 100-percent cure rate on such problems as the inability to ejaculate, the need to have sex in a mask, impotency and an unnatural obsession with lesbians.  A note to fans of the genre: The final scene contains that rarest of occurrences in Japanese porn, pubic hair.  Yes, fans, there is bush.