Racism in Islamic Heaven

Racism! All the heavenly babes 
in Islamic paradise are WHITE.

All the sultan's women are white in every painting of harems. In all pictures representing Islam's 72 heavenly virgins for each man in Islamic paradise, the women are white. Perhaps we should cry, "RACISM! Shame on Islam. It's a racist religion!"

Women of all races are beautiful so why does Islam have a  preference for white women in their heaven? Is this racism against whites, as in white women are the houris (etymology meaning whores) of a supremacist Islamic heaven to be used for eternal sex, or is it racism against women of color because 1400 years ago in Muhammad's day white skin was desirable to Arabs, the skin of their own women being quite darkened from the hot desert sun after a lifetime of hard work? Even Muhammad's flying horse Lightning (al-Borak in Arabic) had the face of a white woman.