You get horny, and you don't prevent yourself. You just go after satisfying your need. Another time you do this. Again another time, and more and more.
A time comes when you feel like you can't control yourself, even if you want to. In the beginning you could if you wanted to, but now things seem to be out of your control.
Personally I've experienced this pattern about food, lust, and responsibility. Empirically I think there should be a pattern that our decisions today will effect our decisions tomorrow. That is, with each decision, mind changes to make that decision easier next time.
Does this truly exist? Do we have a theory or a research behind this pattern?
I think each decision effects mind in a way that we might say that special connections are made between neurons and those special connections will impact next decisions of the same kind. I searched and couldn't find anything.