"Be a little gay and a little more interesting for him.
(8 year old voice) Huhhuh. She said "Gay.""
I wonder if, in 1955, anybody read that an immediately thought - "Girl/girl that would be a nice way to greet me when I come home." Maybe it's just me.
The film was also the first film to use the word "gay" in reference to homosexuality. The line occurs when David (Cary Grant) cannot find clothes to wear after Susan (Katharine Hepburn) sends his clothes into town to be dry cleaned. He is forced to wear a negligee, making him look rather foolish. When asked why he is wearing such clothes he leaps in the air and exclaims "Because I just went gay all of a sudden"
It didn't enter popular parlance until the gay rights movement of the 1960s.