Yeah, that happens. You'll eventually get violent urges too. If you go full on predator (by letting yourself feel these things, they can be suppressed) you'll get the urge to rip out throats with your teeth.
It should be noted that if you don't suppress these feelings you get mad endorphin rushes. Your body will reward violent thoughts.
In all of the universe there is only one person with your exact charateristics. Just like there is only one person with everybody else's characteristics. Effectively, your uniqueness makes you pretty average.