That's actually quite common - people trade because they want to experience the thrill of winning.
The rule number one is that trading should never be done for fun.
If it's some fun you're looking for, you are better off going to the casino.
It's easy to say that trade an amount which you can afford to lose but when people lose, they either get depressed or they tend to invest a higher amount with the mind plan to gain not only more profit but also the amount they have lost. Since I have an experience with Stock market as well, I've seen many who don't try to be greedy initially but the streak of winning makes them lose not only what they have earned but also they are also affected mentally. It's better to trade to gain an experience rather than be emotionally attached to it which can be worse. It's not fun but when you don't get an amount you expected, accept it and move on rather than be stuck with your loss.