What I think when I hear:
Zaftig -- a girlfriend I had in college who later became anorexic, women in paintings by Rubens , Shelly Winters, Bette Midler, Mae West, fun and sexy women
Buxom -- Playboy in the 50s and early 60s, Jayne Mansfield, Little Annie Fanny, nurses, burlesque, "Wubba, wubba, wubba, wubba!"