Most of my life has been devoted to the preservation of human life, but I'm easily capable of being tortuous and even murderous in nature. For me though, it's a matter of the ends justifying the means and comparing situations to my own moral code.
*sex offenders, animal abusers, poachers, human traffickers, etc -- I will whole heartedly admit that I will kill someone, maybe many, before my life comes to an end. I would absolutely love to hunt a hunter (poacher) in the wild and show them what it's like.
Another example is how highly manipulative I can be. At first I learned is just as a form of confidence boost, but then I would experiment for a period of time with basically fucking with peoples heads -- I loved 'creating' a few stalkers for myself. Obsessive people are fascinating~ Overtime though, I backed away from this although I still find myself subconsciously doing it to people and I have to smack myself back to my senses and 'fix it.'
In other cases, I'm a deep seeded romantic and will treat the girls I've dated like an absolute Queen most of the time, but there's something about passionate, aggressive, possessive, and even domineering sex (BDSM etc) which cultivates further growth as a couple in both of us. It's almost comical how I'm essentially worried of her getting hurt from everyday things, even on a minor level, and then the next minute she's tied up with red marks all over her body and we're both just loving it.
With all that I said, I thoroughly embrace people that can be open about their desires. I find people who acknowledge a darker or evil-er side of themselves as truer than the excessive amount of people that pretend to be good when they're not.