Right. It's simply not there in our culture!!! In school, we are taught moral science and work ethics but sadly, we have failed to apply them or at least not applied sincerely in practice. Courtesy comes from sincere work ethics and self-respect but we hardly respect ourselves and our work. Of course exceptions are always there, but in general terms, we are still way behind some of the workers from other countries. If we are sincere enough, we will be courteous to ourselves and our co-workers.