Pillow Talk (1959), Doris Day, Rock Hudson, Tony Randall, directed by Michael Gordon. A studly bachelor develops a cunning plan to seduce his best friend's girl by pretending to be two people: his nasty self and a nice Texan. Good thing this is a comedy or that would be very bad. Everyone has opulent apartments, clothes and offices. It's kind of a return to the screwball comedies of the 1930s; people wanted to see rich and fashionable settings then, too.
1959, saw Doris Day paired with Rock Hudson for the first time in a movie. They both were on contract with Universal at the time - that movie? Pillow Talk - it was the first of 3 movies they made together (Lover Come Back and Send Me No Flowers) - here's Doris singing over the opening to Pillow Talk.