Your 14, you really shouldn't be fucking with your brain chemistry as much as this drug fucks with brain chemistry.
But you will do what you want to do with your life reguardless of what i say, its a harm reduction website so im entitled to say it....
I think my girlfriend is kind of similar, she has burned herself with cigarettes while rolling on purpose.....
It kind of reminds me of when we were doing ketamine at a party.... A friend of mine was smoking a cigrette and ended up burning himself with it and was like "oh shit, oww!" and i was just like "hey man, your on ketamine, the sensation is there but it just doesnt apply as pain" and he looked at me and was like "now that you mention it, it doesn't actually hurt"....
But yea, it will change the way you percieve external stimuli. I am naturally a little masochistic sober so I don't have a problem being bitten to the point of leaving bruises for a week, scratching, etc...