If they can make it cook and clean too I'm in the market for one.
The Japanese are way, way ahead of China in the race to make a Stepford Spouse:http://www.youtube.com/watch?NR=1&v=MaTfzYDZG8c
So, let's imagine it's 20 years in the future, and climate change and the downslope of cheap fossil fuel production haven't started dragging us toward James Howard Kunstler's "World Made by Hand." There are male and female robots that look at least this realistic. They're smart enough to cook, clean, do household repairs, and perhaps keep a baby or toddler from hurting itself, but they're not sapient people. Conversationally, imagine that they are to Siri what an XBox 360 is to a 1980's vintage Atari console, their knowledge base is Google (or its equivalent 20 years from now) but they have no wants, desires, or opinions of their own. And of course they are fully usable for sex.
In other words, both men and women can buy a "perfect," pliable robo-spouse that does what they want it to and never complains or has a bad day. You can have them customized to look like a celebrity (the celeb gets a royalty). And let's assume that they're at least as cheap as an automobile, so that most people in developed countries can afford one. High-end luxury models would have less Uncanny Valley-ness, be capable of more sex positions and whatnot, have longer battery life, etc..
Would this be the end of interaction between human males and females? If this sort of technology existed for awhile, would we see separate male and female civilizations, with maybe some outliers in the LGBTQH (the "H" standing for "Human," i.e., those unusual that still wanted to have sex with other humans)?