The state of the art in erotic gadgetry is still very crude, and there are reasons, both technical and deeply human, to doubt that we will soon transcend the familiar bodily requirements of our most urgent desires.

Though the engineering challenges of simulating human sexual interaction are difficult, there’s no reason to believe that they are impossible to solve. Sex that entirely lacks human feeling and attachment may sound unappealing or even repugnant to many people, but at some point in the future, sex robots will become viable. A central question is whether that arc of progress will take so long that they will be leapfrogged by a different technology: neural virtual reality.

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http://www.wsj.com/articles/the-future-of-virtual-sex