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Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021.

“[My professor is] the only one so far who’s made me like math. Where I was before, everything was just overwhelming. He goes step by step. He’ll tell you, ‘You can do this,’”Donna Davis, a student in Robert Puhak’s remedial math class

“Sexual fantasy obeys its own set of rules that have nothing to do with propriety, common sense, or even the physical laws of the universe,”Ogi Ogas, a neuroscientist, on porn

“In Ghana, you’re not allowed to point with your left hand, because the left hand is reserved for dirty things,”Daniel Casasanto, a psychologist who studies left- and right-handed biases

(Previous quotes from our sources here)