Back in the '60s, before mainstream or music heard on the radio could "tell it like it is" about sex, there were other ways of saying what men liked about women (and I'm talking black men and women). A popular blues song back then done by lots of musicians was "Big Leg Woman." It talks about how everything about a big legged woman was what the singer liked - including the clothes she wore that were especially tight. Of course, it was "thickness" the song was talking about. You can't have a big leg woman without big thighs and a big ass. The idea of liking thickness has been expressed in mainstream black culture going way back to (and before) the Great Migration.
Also, as a young boy, the contrast was that you didn't like or were attracted to white American women physically because they were known to traditionally have flat asses. Of course, there were always the big-ass Marilyn Monroe, Jane Russell types and they were - um-hm - big ass, big tittied women. And I discovered later in life that there were more than enough thick white women to go around and enjoy...
(And that's not even getting to what women were considered the most desirable for bearing children in many African tribes, which made big hipped, thick women the most sexually desirable...)