Rachel Donadio’s essay in Sunday’s New York Times (“It’s Not You, It’s Your Books”) explores the touchy subject of reading habits in romantic relationships. Say you liked Jonathan Franzen’s “The Corrections” or “The Fountainhead” by Ayn Rand and you find out your date didn’t. Poof. Instant turn-off factor. The disclosure causes the same illogical deflation as the sight of someone clutching a fork like a shovel. Some habits aren’t sexy. With books, it’s a matter of taste, so it’s even more important.