Apologies if you've just spurted your precious morning coffee all over your keyboard, but the above graffito does indeed say what you think it says. Take another look. Yup, it's still there.

To add …

I'm not sure to what extent "Grafitti Studies" has (as a discipline) permeated academic institutions, but I'd be surprised if the below offshoot of the artform has recieved much scholarly attention.

The circumstances in which such graffiti …

A doodle. Done at work. Inspired by the day that's in it. Or possibly something else entirely.