Human is greed. It is already rare that you can win because of the house edge. And when you win, you already know that you are on luck right now so you will naturally think that since you are able to get $100, you will be able to get another $100 and so on. This is the same as stock market also. You will keep pray that the stock price will keep going out so you can earn more and may overbuy with no balance profile.
As in the previous game you have won easily too , then why not to give another shot?
They don't know that the house edge will eat you! It will make you get nothing but only house edge get the profit.
Absolutely, our mind always thinking to make money and search the way where we could earn money in a less time. We are always greedy for money more than love, and in gambling we see that we could come true our dream of make money. Also i agree with you, when we win in a bet then our mind convince us to do more bet and more win. But we don't know the next step.