Mozart’s Cosi Fan Tutte is a social and psychosexual mess, as a man goads two younger friends to test their girlfriends’ fidelity through a series of disguises and lies. Cynical Alfonso wagers that if the girls believe their boys have gone off to war, the ladies won’t last a day before landing in bed with someone else, because, as the title roughly translates, “women are like that.” So the boys dress up as Albanian soldiers, and each targets the other’s girlfriend. Cleveland Orchestra conductor Franz Welser-Möst says the work’s insight into human nature makes Cosi Fan Tutte his favorite opera. He brings Zurich Opera’s 2009 production to Severance Hall this week. Welser-Most also leads a free preview discussion with the cast at 3 p.m. today in Severance Hall’s Reinberger Chamber Hall. Call for reservations. The opera opens at 7 p.m. Tuesday, with performances through March 8 at Severance Hall (11001 Euclid Ave., 216.231.1111). Tickets: $68-$222. — Michael Gill
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