What do you think about the time I had the urge to stab my friend?
Why did you want to stab your friend?
I don't know, I haven't felt like that before.
Controlling your emotions is a good trait. You should seek some further help about it.
Psychology is subjective and I think my reason is good enough. My friend started to insult me and that made me angry.
Now and then, everyone has violent impulses that they don't act on. As long as you can recognize how irrational the impulses are and you don't give into them, then you'll be fine. If you were to give into such impulses, you could hurt somebody and end up in a lot of trouble.