Fang Huai was a bit obsessive-compulsive.
During his school days, once he saw the ground, he couldn't step on the cracks between the bricks, feeling that stepping on them would lead to his death; in autumn, if he encountered fallen crisp leaves, he had to completely crush them, and if they weren't fully crushed, he would turn back to step on them again.
After entering society, he would return to check the toilet to see if it had flushed properly, even more than ten minutes after doing his business; when encountering a familiar movie scene, song lyrics, or past events that he couldn't remember, he could be tangled up for a whole day, sometimes even forming imaginary memories.
Thus, when scrolling through short videos, he found incredible satisfaction in those about teeth cleaning, earwax removal, carpet cleaning, or fixing donkey hooves.
What he was doing at the moment very precisely scratched his kidney reflex area.