Doing the same monotonous tasks over and over again, every day you work, for hours on end will begin to wear on your after a while(Unless, of course, you have severe OCD issues and work in a factory creating the berrings that go inside ballpoint pens, or something of that nature). This is why some of us find things to liven the atmosphere so as to prevent the impending doom known as mental insanity. I probably already have some of that already, but working at this place I feel increased the level of it, for a while there, at least. Anyhow. . .
You have to make things enjoyable sometimes, I suppose. The owner probably wouldn't have found it funny, but what did he find funny? Not much.