I love that saying. I am going to tell it to the young ladies in my family at the appropriate time. My sense over the years is that the women I have known who hooked up were either really REALLY drunk or really REALLY calculating for some end scheme. Otherwise, they did not hook up.
Men on the other hand, want sex. Afterwards, men don’t really think about it (at first). They do ultimately reach the conclusion that hooking up is empty and unfulfilling just like women. The difference is, women reach that point after 1-5 such encounters. Men can hold out for 1,000 or more before they realize its empty and unfulfilling. Which in my opinion is the wrong conclusion-men actually realize that they just can’t be filled or satiated so it will go on indefinitely. Therefore, a man’s conclusion to an endless cycle of hook ups is more a reflection of a lack of efficiency or of some dividend to show for their industry, not that it was not fulfilling.
...ah such is human nature (at least from my vantage point).
I think men hold on to the “relationship” until the pain of the nagging outweighs the pleasure of the sex. Then he moves on.