tattos are a form of permanent body modification
I know that, I have considered getting one before but I really don't know if I should.
tattos also have three broad categories they fall under
Which categories? I hadn't heard of this before.
the categores are decorative, symbolic, or  pictorial 
Hmm that's cool, I think I'd go with a symbolic one.
Tattoos were seen as uncivilized for most of history
That makes sense, right? Since they were originally from Africa or something.