What is the point of this little breast pocket near my left shoulder?

I have like 10 t-shirts with a tiny breast pocket right over my left nipple, and what am I supposed to put in there? I've never put fucking anything in this pocket, but it's always there with a tiny tag from whatever manufacturer made the shirt.

  • BobDole [none/use name]
    ·
    5 hours ago

    I put my sunglasses in it (lenses in, one of the ear pieces out). It feels nicer than on top of my head or on my collar.