Some Like It Hot (1959)
A:      Jerry (Jack Lemmon)
B:      Joe (Tony Curtis)

A:       I'm engaged.
B:       Congratulations!  Who's the lucky girl?  
A:       I am.  [hums the tango] 
B:       What?   
A:       Osgood proposed to me.  We're planning a June wedding. [hums the tango] 
B:       What are you talking about?  You can't marry Osgood.
A:       You think he's too old for me?
B:       Jerry, you can't be serious!
A:       Why not?  He keeps marrying girls all the time! [hums the tango]
B:       But-- but, you're not a girl, you're a guy!  And why would a guy want to marry a guy?
A:       Security. [hums the tango]
B:       Jerry, you better lie down.  You're not well.
A:       Will you stop treating me like a child?  I'm not stupid.  I know there's a problem. 
B:       I'll say there is.
A:       His mother.  We need her approval.  But I'm not worried because I don't smoke. [hums the tango]
B:       Jerry, there's another problem.  
A:       Like what? 
B:       Like what are you gonna do on your honeymoon?   
A:       We've been discussing that.  He wants to go to the Riviera, but I kinda lean towards Niagara Falls. [hums the tango] 
B:       Jerry, you're out of your mind.  How are you gonna get away with this?
A:       I don't expect it to last, Joe!  I'll tell him the truth when the time comes.
B:       Like when?
A:       Like right after the ceremony.
B:       Oh.
A:       Then, we get a quick annulment, he makes a nice settlement on me, and I keep getting those alimony checks every month. [hums the tango]
B:       Jerry, Jerry, Jerry, listen to me.  Listen to me.  There are laws, conventions.  It's just not being done.
A:       Shh!  Joe, this may be my last chance to marry a millionaire.