Story idea - The grey itch

Mark Ruffalo on We Don't Live Here Anymore:

"Well, it's honest," he says of the film. "The way I see it, almost every interaction in a human being's life has some bittersweet shit in it. They have this thing called the grey itch. It's when a man - I think it's particular to men, although probably women have something similar - comes to the end of youth, or what your perception of your youth is. Which is really just the attainability of your dreams. There comes a point where there's so much road underneath you that you realise, 'I'll just never have that thing.' "

The narrator has it but Boris never loses it.