Last lines of 'Some Like It Hot'
Jerry: Oh no you don't! Osgood, I'm gonna level with you. We can't get married at all.
Osgood: Why not?
Jerry: Well, in the first place, I'm not a natural blonde.
Osgood: Doesn't matter.
Jerry: I smoke! I smoke all the time!
Osgood: I don't care.
Jerry: Well, I have a terrible past. For three years now, I've been living with a saxophone player.
Osgood: I forgive you.
Jerry: [tragically] I can never have children!
Osgood: We can adopt some.
Jerry: But you don't understand, Osgood! Ohh...
[Jerry finally gives up and pulls off his wig]
Jerry: [normal voice] I'm a man!
Osgood: [shrugs] Well, nobody's perfect!
[Jerry looks on with disbelief as Osgood continues smiling with indifference. Fade out]
http://www.imdb.com/title/tt0053291/quotes (search for 'perfect')