Lori Fradkin explains it:

The job has its perksan accumulation of random knowledge, for instancebut it also has its side effects when you unintentionally drink the copy Kool-Aid. Once you train yourself to spot errors, you can’t not spot them. You can’t simply shut off the careful reading when you leave the office. You notice typos in novels, missing words in other magazines, incorrect punctuation on billboards. You have nightmares that your oversight turned Mayor Bloomberg into a "pubic" figure. You walk by a beauty salon the morning after you had sex for the first time with a guy you’ve been seeing and point out that there’s no such thing as “lazer” hair removal, realizing that this may not be the best way to get to have sex with him again.

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