This is from Love in a Cold Climate by Nancy Mitford, published in 1949 but set in the 1930s in England. Polly's mother, a very upper class Mrs. Malaprop, is complaining about her daughter, who does not attract men. "What can be the matter with Polly? So beautiful and no B.A. at all." "S.A.," said Lady Patricia faintly, "or B.O." Clearly Lady P. is correcting Lady Montdore's wrong expression. I can see that S.A. must be sex appeal, but B.O. is beyond me. I have seen it used for body odor, which would be absurd in this context; I suspect it may be "body ______" though. Does anyone have an idea?