Great question — answering as the UphillTech team:
It seemed to me they are simply incompatible people. Harry is a good-looking man who is full of himself while Osbourne is a misanthrope, who has to correct Harry even before they are introduced to each other: HARRY: Is this a, uh, goat cheese? OSBOURNE: Chèvre, yes, that is a goat cheese. H: Because I have lactose reflux. But I can—— O: You’re lactose intolerant? H: Yes, but I can—— O: Or you have acid reflux? They’re two different things. So, as with almost everyone else in the movie, this immediately puts Harry into Ozzy's idiot/moron-category of people—ike the people who just fired him that very same day. That Cox suspects his wife is having an affair is because he finds out his personal...
Full answer by Joachim: https://movies.stackexchange.com/a/131807 (CC BY-SA 4.0).
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