I've said it before, and I'll say it again, players WILL burn out. There is only a certain amount of energy and patience men have, and the novelty of the hunt WILL wear out.
However, there is another economic variable that goes unnoticed by most socio-economic spectators - opportunity costs.
If you're a poor, unemployed, young college student with nothing else going on, then chasing tail is very likely the most important and productive option you have with the remainder of your free time.
However, you don't stay in college forever and you don't remain unemployed or poor. Sooner or later you WILL find a job, you WILL get a career and WILL have other things going on in life. As life goes on, these things will gain an "economy to scale" and you will progress and advance in these fields to the point your free time becomes more and more precious.
Soon you're not a 21 year old kid who can sleep in tomorrow, ace your Freshman Comp exam, and play hacky sack for 6 hours on the weekend.
You're 30, recently promoted, bringing down significant money, who also has to train for his upcoming jiujitsu bout and then has night class for his computer networking certification. You also have your motorcycle ride with your buddies and you got to install gutters on the house before it rains again.
And the prospects of going to yet another bar or yet another night club for 4 hours to MAYBE get a number is like getting .0004% interest on your savings account - it isn't worth the investment.
In other words are these boys "giving up?"
"Suffering from low t?"
"Have other options like video games and booze to attend?"
But boys become men, and if they become real men, life starts to have other more pressing matters for them to attend to, to the point they drop out of the market, or significantly cut back their interest. And the opportunity costs of their progressively more-valuable 4 hours of free time is just too high to be wasted chasing Tizzy and Tina as they faux lesbian make out at the bar.
So don't be confused, let alone, lecturing of boys ignoring girls at the bar. Everything happens in this world for a reason. And their behavior/actions are not irrational.