It's a maze

This is a question that I cannot answer:

Why do we still need to stack up empty shampoo bottles with the ones still with contents side by side?

I understand the 'empty shampoo bottle' phenomenon especially if the shampoo was an expensive/ specialty shampoo or if it was from some Hilton hotel in Los Angeles or wherever.

I have come across some instances (and so have you, I believe) where you can see stacks of shampoo bottles with the gel douche and moisturising lotion whatnot either on the sink or around the washroom. Beautiful. They must be there. It shows people how much of a traveller you are. In some rare cases can you might even come across eau de toillettes. Complimentary, from the most luxurious hotel you can name. Teriffic!

Despite all this, I still cannot understand why empty shampoo bottles (No, not empty bottles from Hilton hotel in Makkah, it's those Head and Shoulders stuff) must be stacked together with the bottles that are still in use...

Let's go somewhere else.

For a second, I thought, why would the clock show 11 o'clock while it was still daylight (I assumed it was 11 p.m.)? I somehow figured out that the clock wasn't working. So I turned my head the other way. The digital clock didn't lie; It was 4.44 p.m.. Great! Now I understand the reason for displaying 3 clocks in one room. I never got the logic of putting more than one in a single room/common area.

One day, I removed one of the clocks and put it in my room (My room hadn't had a working clock in it for years, till then). It was sickening to see three clocks in one place. The day after, another new clock was there! Fabulous! Someone had put a new clock there! That place really needed 3 clocks after all.