"You cannot negotiate genuine desire."
"You cannot negotiate genuine desire" is one of the most important concepts in game and life. The actual title of Rollo's post is "Transactional vs. validation sex," but "You cannot negotiate genuine desire." Pretty much any guy who's been in a long-term relationship will relate to the point.
Guys who haven't been in a long-term relationship should be working on their game rather than reading about the distant future, but once game starts working it's a good idea to know what the future holds.