Schema using size as the basis for classifying the penises of mankind. Originally applied to South Asia, it was later expanded to the whole of mankind.
The 3 Aryan castes rank as follows: the 4.5 inch `White' Brahmin Penis is smallest, followed by the 6 in. `Pink' Kshatriya Penis & the 7.5 in. `Yellow' Vaishya Penis. Largest of all is the `Black' 9 in. Shudra Penis of the Dravidians:
"In accordance, Hindoo males were thus categorized:
Shushah (hare man), the beau ideal of manhood. He is lithe & strong. Being the counterpart of Pudminee & a Brahmin, his penis corresponds in erection with the yoni {vagina}. It is is small (two or three inches), & proportionately thin.
Mrigah (buck man), the perfection of warriors. He is fleet & graceful. Being the counterpart of Chitrinee & a Kshatriya, his penis is slightly thicker & longer, four or five inches.
Vrishubha (bull man), the tough muscular artisan type. Being the counterpart of Sunkhinee, his penis is (for a merchant) from six to seven inches in length or (for an agriculturist) from seven to eight.
Ushvah (stallion man), the most coarse & vulgar of the group. He is worthless & indolent save for propagating his kind. Being the counterpart of Hustinee & of the servile {ie. Shudra} caste, he has adorning his body a nine to ten-inch, wrist-thick tassel; & his seminal water flows like the Ganges in flood." (Ananga-Ranga, in: 'The Jewel in the Lotus' Allen Edwardes. NY: Julian Press, 1959, p.60).