Realistic Vagina have been used the world over by sex therapists in order to teach and enlighten men and women about sex and masturbation. A lot of guys feel very guilty after masturbating. The guilt is melted away under the guise of the Realistic Vagina. It also works as a fantastic tool if you're inexperienced - it's very close to the real thing in feel and the size is spot on - using the realistic vaginas can be a great way to enhance sex with your partner by "getting used to" the feel of it.