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Animals embrace Valentine's Day

tiger with perfumed heart

Photo: ZUMA Press

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Intoxicating scents

Sarah, a Sumatran tiger at the London Zoo, plays with a heart-shaped piece of wood doused in designer perfume. Zookeepers often use perfumes — Calvin Klein’s Obsession is a big favorite — to help spice up big cats’ love lives. The smells increase the amount of time the cats explore their territory and encourage social interactions like mating.