swing bachelor matthau and a successful dentist and be string along his blond mistress hawn and have tell her that he a married man with three kid . after she attempt suicide matthau decides to get responsible and marry the girl . worry that she go to be a homebreaker and bright eye hawn want to meet his wife and explain everything to her . matthau employ his faithful nurse bergman to act his wife and that when thing really get complicate . a farcical comedy with irresistible lead quite often hit the mark but isn not for one second believable . the script ask u to believe that u men be such one dimensional turd that it truly beyond belief . but maybe this comedy doesn not need to be analyze too deeply and just sit back and enjoy the ever so funny matthau and the ever so charming bergman and débutant hawn and who here basically create the dumb blond girl role .