This thread is NOT about general CBT. In particular, it is for vids that show a top slapping his cock against a bottom's balls. I think it is hot when a bottom is stroking himself while getting fucked and as the bottom gets more and more stimulated, the top withdraws and slaps his cock against the bottom's balls, either drawing the bottom back from the precipice or sending him over it. But for this thread, the bottom doesn't need to be stroking himself while it happens. Just a top asserting his dominance but smacking the bottom's balls with his cock.
