In the back room of A.I.R. Gallery in Brooklyn, a scent dispenser exhales once an hour. A meandering plastic tube connects the dispenser to a six-and-a-half-gallon jug on the floor near the center of the room. The jug contains the concentrated form of a custom-formulated perfume derived from sensors that measured the carbon dioxide exhaled by the artist Amanda Turner Pohan during thirteen unique orgasms.[…..]