As most of us now know, when orangutans come into heat their backsides swell and redden. But in years gone by, the poor zookeepers had to put up with endless accusations from the public: "How come you don't look after them properly? Look how bad their piles are!"
猩猩發情時屁股會紅腫，是現代人都知道的常識，但早年圓山動物園的管理人員卻常被遊客責罵：「你們怎麼不好好照顧，讓它痔瘡這麼嚴重！」