You should wear bras and jeans multiple times before washing to avoid stretching and discoloration, respectively.
I'm a cleaning expert here's how often you should actually be
3 Ways to Clean Underwear - wikiHow
How Often to Wash Your Jeans, According to Experts
The right way to wash your bra: tips and tricks
Should you wash your clothes after wearing once? - Daily Record
How often should you actually wash your jeans, bras and towels?
Washing socks, bedsheets and undies leaves the internet divided
Things you are washing too often: according to laundry pros
How Often Should You Wash Your Bra? – Cleveland Clinic
Here's How to Properly Wash Period Underwear, According to a