A Joke (if you can call it that) (I didn't want to call it that anyway, for fear of giving it away)

Here's a true story. I'm no good at telling jokes so it might not be all that dramatic or funny.
In 1994 my grandfather was posted as Commandant at the Army Aviation Engineering School Dhamial Camp, Rawalpindi. He didn't like all the rubbish that everyone had thrown about all over the place, because he is a very neat person. He installed several large dustbins at suitable locations in the school and living quarters, especially near the kitchen and the mess hall. In a follow-up inspection visit, he saw that a lot of garbage had been dumped near the dustbins, but not in them, even though they'd been put there for that purpose. When he asked the kitchen staff why they hadn't thrown the garbage in the dustbins, they (probably shifted uncomfortably and) said: ''They're so pretty. They'd get dirty''.