items. that s where usually they ll burn soot, take paper or oil, and burn it on the bottom. burn oil, baby oil, hair oil, hair grease, styrofoam cups back in the day, anything that doesn t burn complete, that s what soot is, unburn carbon, put it underneath the desk or in your locker box or something. and then you put that in your body. oh, yeah. does it pose any health risks? yes, of course. of course. but so does homosexual activity and they are not trying to stop that. he told me that he learned how to tattoo in prison, and then when he went back out on the street he learned more techniques. and i guess he brought those back in with him when he was incarcerated again. like using multiple needles to do tattoos.