When I was a teenager I thought I was doing what everyone else was doing...turns out, they were doing what I was doing...*sigh*
Unfortunately, self-harm easily becomes a teenage fad, which I think is a fairly awful reality, but have been witness to it, time and time again....
I used to heat a lighter and sear my skin (I still have little happy faces scars on my hands and wrists)
I didn't quite get involved in the cutting, but often punched walls... (this usually occured when I was trying to redirect some form of physical pain I was experiencing)
*I knew girls that spent their days engraving symbols and initials of their current BF in their legs, more out of boredom and fad than any more obvious reason.
On occasion I have been so frustrated I would hit my head off of the wall, but never repeatedly.
And I am not sure if this qualifies, but the one and only thing I do as an adult is compulsive picking.
My picking is really bad when I am anxious, but otherwise become fairly casual, but constant.
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It isnt a programming error, it is an operating system...