Some of them even date their pillows. Guess it's better than them going out and serial killing...

http://gizmodo.com/5321350/japans-2-d-lovers-falling-in-love-with-a-body-pillow

DON'T...DATE...ROBOTS!

But seriously, it's not a far fetch to imagine this. People had meaningful relationships via postal mail years ago and frequently never met, which eventually morphed into Prodigy and AOL (Did anyone ever hook up through Compuserve?). So while we don't necessarily need the physical sometimes, there are many people who can do without the mental. And maybe the robots can be operated by all those sex workers who will find themselves out of a job.