Stick to you like white on rice

Hi all. I searched the archives and googled, but cannot find the origin of the expression "like white on rice". My sister insists that it is a racial expression and not to be used by polite society.

I understand the meaning, it's the origin (and whether or not it's racist) in which I am interested.

Thanks!

My opinion: it's not racist. Ike Turner, an African-American, was the first person I heard say it and I, a European-American, was not offended. Sometimes rice is just rice. White on rice is just a cleaned up version of "stink on sh*t."

Ike & Tina Turner, "Baby Get It On"
Album: Acid Queen

TT: we're gonna get it on
...and we goin on

IT: you dont know, girl how
you blow my mind.
I said now baby, won't you hear what I say
I want your lovin' in the worst kind of way, so come on, baby let's get it on

TT: ah huh

IT: Now you're the finest girl I ever saw in my life
I want to stick to you like white on rice
So come on.

TT: ah huh