in our hostel in quito, the capital of ecuador:
me: hey, when you walk around or take the bus in a big city, do your boogers get black?
megan: yeah, they always do.
me: it happens to me in london.
megan: it’s kind of like evidence of all the pollution.
me: there should be a booger index, don’t you think?
megan: a what?
me: like how bad the pollution is, as evidenced by the color of your boogers.
me: yeah. if your boogers are grey, you’ll be okay. if your boogers are black, you better turn back!