Why kali Maa tongue is out?

As per the mythology, Goddess Kali’s tongue is seen lolling out is domestic. After she killed demon Daruka, Goddess drank his blood. He transformed into a handsome man and lay down in her path. As soon as Goddess Kali stepped on him, she got embarrassed and took out her tongue. Also, she stopped right there, killing demons and returned to her standard avatar. Her tongue out is her embarrassment on having stepped on the man lying down in her path. Asper other stories, when Goddess Kali killed other demons, she lapped up their blood and sucked out until the monster died. Her anger was so uncontrollable that her tongue seems to loll out.