Kurobey & Monologue
I think Kurobey's tongue is so long when he is yawning and panting. In a Japanese dictionary, there is a word, choukouzetsu, which is consisted of three Chinese letters. They separately mean long, wide and tongue but the word means long speech and monologue. In Kurobey's case, although he has a long wide tongue, he rarely talks. It doesn't mean that he rarely barks. He is reticent. However, He changes his tune so quickly and makes sweet sounds when he met dogs, cats and women.