狗是人们喜爱的动物之一,狗很有灵性,看见主人归来,总是不停地摇尾巴,以示欢迎。狗为什么会有这种习惯呢?原来,狗的尾部有散发体味的腺体。狗在互相“认识”时,总要互相闻闻对方的屁股。当狗急于想表白自己,强调“这就是我”时,就用尾巴当扇子,将带有自身气味 Dogs are one of the favorite animals, the dog is very spiritual, see the owner back, always keep the tail wagging to show welcome. Why do dogs have this habit? It turned out that the tail of the dog is distributed gusto glands. When dogs “know each other”, they always hear each other's ass. When the dog eager to confess their own, emphasizing “This is me ” when the tail as a fan, will have its own smell