Here, have exactly a hundred words of Steve Rogers thinking about coffee. (Avengers movie-verse, G)
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Steve has never been fond of coffee, at least not without dumping in plenty of milk and sugar in first, but in the war he'd learned to stomach the bitterness and choke it down.
This is why he finds the coffee of the future so unsettling: the sugar isn't real, and the creamers don't taste right. It's all artificial, convenient, cheap in a way that awful rationed coffee hadn't been, and that's sad, in his eyes.
So he takes it black and if he closes his eyes, he can pretend he's back in France, complaining about the taste to Bucky.
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