Sorry for the double post - I'd just like to ammend the normative "healthy" in my post to "desireable."

Also, Futurama had an episode on this: I Dated A Robot. Unfortunately, I was unable to find a link to the 'educational video' included in the episode. It outlines the situation in a humourours way (if you want, the full episode can be found on Google Video, but I thought it impolite to link to pirated TV on this site).