Where did this ‘never wash your jeans!’ mentality come from?

It feels like jeans - regardless of designer or ‘raw denim’ status - were clothes until about seven years ago, then they became fragile and precious jewels.

News flash: if you’re worried about washing your jeans, you’re inventing problems because you have none of your own.

Where did this ‘never wash your jeans!’ mentality come from?

The same place all religious and other propaganda comes from. Plus it’s useful to spot the gullible and easily led people so you can avoid them to save your sanity!