Is this the same principal of "He Who Cares the Least, Wins"?
I'm familiar with it, and you're right -- it "works." If, by "works," you mean you can get a desired outcome. But I also learned in a management seminar once that "There's a difference between commitment and compliance , and I think this principal -- when applied to a R and to ML in particular -- would only lead to compliance.
I also have to look at myself in the mirror at the end of a day. I do the romantic things for my wife, and help with the household chores, because I want to be a good person and I know she likes them. I've long since determined that they're not going to lead to sex, but they're still the right things to do.