Your tongue eventually gets an uncomfortable cut from rubbing against the sharp edges and touching the aluminum tab that hangs down in the can of pop, and you get tab-scratchers.
Person: Gah, my tongue is killing me! I stuck it in the hole of my vintage Pepsi Throwback and now I'm stuck with this cut! Ahh, it hurts so bad!
You: Yeah, I know how it feels to have tab-scratchers.