[["It is a form of chemical communication. With their sensitive noses, Dogs can tell gender, health, diet, even emotional state with one sniff.", 1869.0], ["By sniffing a rear end, a dog can gain a lot of new knowledge, from his new friend's gender to his present mood and age -- and then some. ", 700.0], ["Because they don\u2019t wipe very well.", 0.0]]
why do dogs smell each others butts
animals,puppy,dogs