Haha, I remember this. This came about when some Hispanic LARPer, called The Hellenist, said this word-for-word on social media.
Brown boys should learn to stop talking against their betters and learn to enjoy them instead~
It actually has its origins in Ancient Greece, if I recall correctly! (Hence why the LARPer was named the “Hellenist”!) A small penis was viewed as a sign of intelligence and modesty in Ancient Greek society, while a large cock was perceived as a symbol of barbarism and brute strength. It’s also why many Ancient Greek statues have small penises!