My friend's weird habit

This is a short post about my friend's weird habit.

One day, I was in a good friend's home and I saw something weird in the toilet.

My friend lives alone, how come there are 3 tubes of toothpaste and 3 toothbrush?!

The reason is very ridiculous:

One set is for the morning, one for the afternoon, one for the night.

I can only say that it's madness.