The Disco Triplets

The popular new documentary Three Identical Strangers recounts the famous story of the New York triplets who were secretly separated as infants due to (spoiler alert) an arrogant Freudian experiment intended to prove the power of nurture over nature. But as 19-year-olds, they found one another during a few joyous days in 1980 when each first learned that he had two identical brothers.

The likable lads, brawny, extroverted Syracuse U. frat-boy types dressed in Saturday Night Fever fashions, be...