So I've seen Mr.Black written EVERYWHERE in my school. Does it mean something? The 1st time I saw it was in my history class and then I thought, what if Mr.Black went to my school. Once I put that thought aside I wondered what Mr.Black was or meant. So I went on google and all I found was gay porn sites. I've also seen it on bathroom windows and in the stairways.

So does anyone know what it is?