I’m on the tram on my way to work and of course I see a lot of random people. But what got me thinking now is the amount of people that have their mouth partially or even almost fully open 99% of the time. I can see at least three commuters right now that completely fail to close their mouths. What causes this? Weak jaw muscles? Heavy lower lips? Big teeth? Swollen gums? Mild retardation? Hmm, the big mysteries of life…