But afterward he had grown to find her cheerful, tender hearted, and, finally, even pretty. He appreciated her cheerfulness particularly. His own sar… - Isaac Asimov

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But afterward he had grown to find her cheerful, tender hearted, and, finally, even pretty. He appreciated her cheerfulness particularly. His own sardonic view of life needed the antidote.
But Jessie never seemed to mind his long grave face.
"Oh, goodness," she said, "what if you do look like an awful lemon? I know you're not really, and I guess if you were always grinning away like clockwork, the way I do, we'd just explode when we got together. You stay the way you are Lije, and keep me from floating."
And she kept Lije Baley from sinking down. He applied for a small Couples apartment and got a contingent admission pending marriage. He showed it to her and said, "Will you fix it so I can get out of Bachelor's, Jessie? I don't like it there."
Maybe it wasn't the most romantic proposal in the world, but Jessie liked it.