Longevity orgasm is the term applied to the orgasms that some people (specifically transhumanists) claim humans will be able to acheive via sex with robots or "sexbots" in the future. The theory is that these robots, expected to exist by the year 2050, will have the capability of delivering incredibly satifying orgasms on demand. It is believed that he availability of these orgasms along with their superior quality and quantity will contribute to greater health and wellness and ultimately a longer life.
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"The Longevity Project" is a book about the factors that contribute to a longer life based on a study that spanned 80 years. It makes the observation that women who climax during sex more frequently live longer.