KARACHI, Pakistan, Jan. 2 — Ali Saleem may have devised the perfect, if improbable, cover for breaking taboos in conservative, Muslim Pakistan.

In a country where publicly talking about sex is strictly off limits, Mr. Saleem has managed not only to bring up the subject on his prime-time television talk show — but to do so without stirring a backlash from fundamentalist Islamic clerics.

And he has done so as a woman.

When Mr. Saleem takes to the airwaves, he is Begum Nawazish Ali, a coquettish widow who interviews Pakistan’s glitterati and some of its top politicians.

A real woman could not possibly do what Mr. Saleem does. In the unlikely event a station would broadcast such a show, the hostess would be shunned. And taking on the guise of a married woman — whose virtue is crucial to her whole family — would be equally impossible.