I go around muttering, "Dr Lechter, Dr Lechter" from when he hangs up on her in the end...
Somehow Buffalo Bill manages to be over the top but without seeming faked, or like a parody, or unitentionally... Just in a bugged out way, the sicker he is, the funnier he is. He's so earnestly unselfconsiously duh. "Wait, was she a great big fat person?" You try to stifle the laugh because you think everyone in the theater might think you're some sick freako,,,