Haha, yes Neil deGrasse Tyson brought up a similar point in a presentation on "unintelligent design". He also referenced the fact that it would be nice if we had two different holes for breathing and eating (like cetaceans!). And yes, it is very gross that we have to deal with the reality of our sex organs and our defecating organs being the same. It will be interesting to see what sex becomes.
Perhaps women will take over and men will become less relevant in all areas of society and will therefore cling like crazy to their ability to create sperm. Synthesize that and well... men may be obsolete and sex may be just a recreational thing participated in by the luddites. Really, I made this comment for the sake of sharing a great Jim O'Rourke tune, but I do think that the role sex plays in our society is going to change drastically, especially as things like virtual simulation improves. If you are able to very closely approximate the feeling of sex in a virtual environment with someone who is not directly in the room with you, people will likely do it. I know I'd give it a whirl, why not?
Actually, the first vibrators were developed to treat female hysteria which is no longer (thankfully) considered a legitimate ailment. Doctors would use the vibrators to induce orgasms to treat the wide and varying array of ailments ascribed to the condition.