I think there's a reason he's called "greenboy".

I have students that only shower every few days or so.
They smell so bad, the students next to them beg me to move their seats to the other side of the room.
The stinky kids are oblivious to their stink.
Greenboy, if you're telling the truth about the lack of showering and changing clothes, you probably stink and aren't even aware of it.