Common sense is not so common

So maybe common sense is not so common


So I go to a fast food restaurant and order. All of sudden one of my burgers is put on the counter tray. I think great, my order is done. However, my burger just sits there getting cold. I ask when my fries are going to come, the staff say in a few minutes.


I say can you put my burger under the warmer, and the staff seem surprised I would want a warm burger. Why would they not keep my burger under the food warmer, until the whole order is ready ?  Well that would be common sense, which is not very common.