(cw slightly suggestive)
Another little anatomy lesson for ya >:3
The cryptid boys have a loooong tongue, but a large part of it is hidden away and they rarely use it's full length. It's tucked away in a cavity in their chest when they're not using it. It's most often used as a part of their threat display along with some hidden teeth that are retractable. Their tongue is also used for swallowing large heart chunks since they're not able to chew very well with their exposed knife like teeth.
...
Y/N did not know this. (At least in this silly little post)
One of Y/N's study sessions was cut short when they asked their demonic boys to stick out their tongue as far as it could go. They only wanted to document it's length in the ever-expanding chapter in their journal that is dedicated to their beloved boys.
They should have expected what would happened next after seeing the smirk the boys gave them before doing as they were told.
Y/N: "Why would it even need to be that long...?"
Sun/Moon: "For the spooks?"
Y/N: "....The spooks...?"
Sun/Moon: ¯\_(ツ)_/¯
(@naffeclipse who else was gonna be the one to give them the giant tongue if not me? X3)