Kirk has invited his mate John Wayne to the premiere of Lust for Life- the bio-pic in which Kirk plays Van Gogh and Wayne comes up to him afterwards, visibly upset and says, "How could you do it? There are so few of us real men left. You should be setting an example, not playing miserable little queers."
And Kirk replies, "You do understand it's all dressing up and make-believe, don't you- this business we're in? I mean, you're not really John Wayne."