A sore someone aquires on the lips or tongue from eating too much hot pussy.
Person 1: Hey, what's that on your lip?
Person 2: Oh, that's just a friction burn.
Person 1: A friction burn?
Person 2: Ya, I got it from eating too much hot pussy.
what happens when you beat off too much too fast not using lubricant...
Girl: why is ur penis all red and brusied?
boy: thats friction burn baby!