the people that usually do physical labour, generally have lower IQ. (i know, I am heavy generalizing), so to them it is ok. For a very smart person, just the

the people that usually do physical labour, generally have lower IQ. (i know, I am heavy generalizing), so to them it is ok. For a very smart person, just the thought of doing the same physical routine, everyday, will drive them nuts. Even the thought of it can be depressing. Probably, for a blue collar worker, the idea of sitting all day in front of the computer, and thinking these wierd problems, will drive them nuts too.