Out: Sex and the city. In: Celibacy and the city!

Less — when it comes to sex — is definitely more, argues Hephzibah Anderson, the author of “Chastened,” a new tome touting the lessons she learned during a sex-free year, from August 2006 to August 2007, a quarter of which she spent in New York.

“By tuning out some of that hyper-sexualized, porn-y clamor, you find yourself tuning into a sort of a subtler romance and being attracted to a different kind of guy,” says the 34-year-old London resident who frequents Manhattan. She was inspired to give up sex right before turning 30 when she saw her college boyfriend walking out of De Beers on Fifth Avenue with a smiling blonde.

“It broadens the erotic spectrum having a contrast,” says Anderson. “Otherwise it’s all full-on the whole time.”