Personally, I think it's hilarious. It exposes human nature in it's raw, primitive state. There are tons of people in the world who want the benefits of a relationship, without all the extra stuff that goes along with it. I think this phrase was invented by someone who liked having 'relations', liked spending time together, but had no interest at all in committing.
ON the other hand...it may have been invented by a pompous putz with a superiority complex, who thinks they can go through life getting everything they want, without having to do the work that others do to get the same things.