https://www.youtube.com/watch?v=Ep2MAx95m20 Around the 12 minute mark she brings up how millions of people have steps 1 & 2 of the 4 stages of desire reversed:

http://en.wikipedia.org/wiki/Human_sexual_response_cycle

The research she cites by Dr Rosemary Basson I think is on to something. Her non-linear model really makes a lot of sense in retrospect of what I've learned about game over the years. In this article the author basically hits upon why physical escalation, when done correctly, can so often lead to sex:

http://suzigodson.com/2013/10/dr-rosemary-bassons-non-linear-model-of-responsive-female-sexual-desire-or-why-your-wife-wife-never-wants-to-have-sex-with-you/

If, a man makes sexual overtures and a woman allows herself to experience the sensations of her partner’s touch, she subsequently begins to feel some awareness of arousal building up.

In terms of game/pickup, this model she suggests here can be translated pretty easily:

http://i.imgur.com/JNbPnRo.jpg

  • Emotional Intimacy = building of comfort and rapport
  • Sexual stimuli = physical escalation, aka kino/haptics
  • Psychological and biological inputs = raising buying temperature
  • Sexual arousal = more physical escalation of a sexual or overt manner (basically 1st or 2nd base)

And the rest is pretty straightforward. Read this for the full description of the non-linear model section:

https://www.arhp.org/publications-and-resources/clinical-fact-sheets/female-sexual-response

Now keep in mind that all of this was originally researched because women in relationships lose "spontaneous desire", so this model my not even be necessary for plates you're spinning or fresh LTRs. That said, once you slide into an LTR and that honeymoon phase ends, this information may come in handy.