I understand where your all coming from with the smelly clothes thing but I kinda take a different approach. I wash them when they get dirty but I just wash them on a relatively hot wash with no detergent and they come out fine. If you never wash your clothes then the build up of perspiration in the armpits of your jacket and the seat of your trousers will accumulate, the bad strong smell you get from sweat as far as I'm aware is a result of bacterial action. So to not wash your cloths will result in the build up of the 'human smell', I think your more likely to be scented.
So maybe the better approach would be to wash your cloths then leave them out on the line for a few wet days for a good old rinse and airing??