Okay, I'm going to go on a rant about robots in general.
I love robots, and wish I could make one myself, but my brain is too imaginative (more suited for artistic endeavors, role playing, and possibly creating anything creative in general...)
I'm for robots that are capable of sex, mainly because there is a market for it, and after robots that are humanoid (androids and gynoids) are built, I don't see why it shouldn't be done. All you'd have to do is make sure their outer body is realistic and coated in something that is skin-like (read : hypoallergenic, rubbery substance that hasn't been invented yet), then make sure that no one invents a robot capable of rape, or one that is a child-size robot that is sexually active.
Also, PC Magazine's 25th anniversary predicted that highly intelligent robots will be available in 5-25 years, so by 2013 - 2033, we should have something like this.
Who knows, maybe in 30-50+ years, we will have something like Hand Maid May's cyberdolls : gynoids capable of pregnancy, human intelligence, and extreme attractiveness...
Who knows what science will bring? Often times, I think science fiction is an accurate prediction for this kind of stuff.
...
Just remembered something. Forget my worries on "rapebots"... The laws of robotics state that a robot cannot harm a human. That means robots for the most part will be for residential and commercial usage, along with usage for surveillance and exploration.
If anyone cares, since it is somewhat relevant, these are the laws of robotics...
- A robot may not injure a human being or, through inaction, allow a human being to come to harm.
A robot must obey orders given to it by human beings, except where such orders would conflict with the First Law.
A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
Most robots made will follow Issac Asimov's rules, even though they are just intended for science fiction, as most engineers of robots see them as an ideal; that when a robot realizes these laws, it will be truly intelligent.
This obviously means that military robots will never be truly intelligent, nor will such things like Battlebots.
This doesn't mean that someday robots like, say, the ones from Medabots won't ever be made for a kind of gaming sport. In fact, that is more likely to happen before sex bots are made.
In general, I give the sex robots till the estimated date of 2020-2033 to be perfected. By this time I will be around 33 - 36 years of age in this lifetime, and will have at most 25 or so years to enjoy such robots if I so choose to.
All in all though, I'd love to see robots that fight each other and look like something from anime first. That would be awesome, and I expect something like that to come around in the next 5 or so years, before sex robots.
And after that I expect to probably see companion, friend and child robots that are for those who are lonely or infertile, to follow about 5-10 years afterwards.
Then come the sex robots.
I hope you enjoyed my rant. I am saving it to my hard drive for further reference... you know, to see if my predictions are right. Most of the ones I make are.