As you grow old, as a man, you realize most people want you for what you offer right now. Especially in relationships. Most women don't want a guy that's going to tell her about how hard his day was at work, how stressful it is that his whole family relies on him, or that he doesn't know where he wants to go in life. They want a man that's gonna do something for them, whether it be excite them, please them, or protect them. What happened yesterday doesn't mean a thing, and tomorrow ain't here yet. So when you can no longer offer anything, they can no longer offer love. It's that simple. And when a man realizes that a lot of people don't love people, a lot of people love things, that's when he starts being selfish. And he starts looking out for himself first.