I agree with ksmybuttons....someone who is basically clean but has been worknig hard doesn't bother me a bit.
Perfumes can be overpowering but there are scents that seem to blend with a person's own odor in an understated way to please with out overwhelming, even when the day's toil is concentrating that scent.
Days old sweat and dirty clothes is another thing.
Besides....showers are just too enjoyable to go that long without one.