So jeans are apparently not meant to be washed that often as they lose their fit, colour and quality. I assume this applies to all denim products. But apparently your supposed to wash them after 3 weeks of use ...
I mean, my DC wear jeans they might get 2days out of them before they go into the wash. Dp will dump his jeans on the laundry basket after wearing them a day (minimum of 3hours if he's worked) so I fold them and put away. Then myself (sorry may sound disgusting) but I chuck mine in the wash once they're dirty. So that could be as long as a week.