Robot sex??? Sounds like WTFs wife...sorry, my bad.
Techno sex has been used as a plot device in Babylon 5 where you put on a complete body suit in order to react with a hologram. Same thing for Star Trek: Deep Space Nine. In one the Captain (Tracey Scoggins) was the object of desire and the other was Nana Visitor but turned out to be Quark from the neck up.
I remember an episode of a forgotten series where Natasha Hentridge was a holographic companion for the last man on the earth. He would go into a sensory chamber for a full sensory experience. Ended badly. All the holograms became the "real" and he was forgotten as his hologram wife had a baby with a hologram him.
Captain Kirk had sex with robots. The skin job Cylons had lots of sex with humans.
As for reality, check out Real Dolls
http://realdoll.com/ they don't move...yet but they advertised as life like including weight, skeletal structure, and features. All you need are some servo motors, nano gears, and a CPU.
If that is our future then society won't last very long.
Cherry 2000 with Melanie Griffith (she is not Cherry).